1
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Hu C, Zheng N. ACS Central Science Virtual Issue on Advanced Materials and Processes for Building Low-Carbon Energy Systems. ACS CENTRAL SCIENCE 2024; 10:1118-1124. [PMID: 38947199 PMCID: PMC11212126 DOI: 10.1021/acscentsci.4c00925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
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2
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Chen J, Lu H, Kong X, Liu J, Liu J, Yang J, Nuli Y, Wang J. Interphase Engineering via Solvent Molecule Chemistry for Stable Lithium Metal Batteries. Angew Chem Int Ed Engl 2024; 63:e202317923. [PMID: 38536212 DOI: 10.1002/anie.202317923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Indexed: 05/01/2024]
Abstract
Lithium metal battery has been regarded as promising next-generation battery system aiming for higher energy density. However, the lithium metal anode suffers severe side-reaction and dendrite issues. Its electrochemical performance is significantly dependant on the electrolyte components and solvation structure. Herein, a series of fluorinated ethers are synthesized with weak-solvation ability owing to the duple steric effect derived from the designed longer carbon chain and methine group. The electrolyte solvation structure rich in AGGs (97.96 %) enables remarkable CE of 99.71 % (25 °C) as well as high CE of 98.56 % even at -20 °C. Moreover, the lithium-sulfur battery exhibits excellent performance in a wide temperature range (-20 to 50 °C) ascribed to the modified interphase rich in LiF/LiO2. Furthermore, the pouch cell delivers superior energy density of 344.4 Wh kg-1 and maintains 80 % capacity retention after 50 cycles. The novel solvent design via molecule chemistry provides alternative strategy to adjust solvation structure and thus favors high-energy density lithium metal batteries.
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Affiliation(s)
- Jiahang Chen
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Huichao Lu
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Xirui Kong
- State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830046, Xinjiang, P. R. China
| | - Jian Liu
- State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830046, Xinjiang, P. R. China
| | - Jiqiong Liu
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Jun Yang
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Yanna Nuli
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Jiulin Wang
- Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
- State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830046, Xinjiang, P. R. China
- Sichuan Research Institute, Shanghai Jiao Tong University, Chengdu, 610218, P. R. China Corresponding Author: Jiulin Wang
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3
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Li AM, Borodin O, Pollard TP, Zhang W, Zhang N, Tan S, Chen F, Jayawardana C, Lucht BL, Hu E, Yang XQ, Wang C. Methylation enables the use of fluorine-free ether electrolytes in high-voltage lithium metal batteries. Nat Chem 2024; 16:922-929. [PMID: 38570729 DOI: 10.1038/s41557-024-01497-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 02/28/2024] [Indexed: 04/05/2024]
Abstract
Lithium metal batteries represent a promising technology for next-generation energy storage, but they still suffer from poor cycle life due to lithium dendrite formation and cathode cracking. Fluorinated solvents can improve battery longevity by improving LiF content in the solid-electrolyte interphase; however, the high cost and environmental concerns of fluorinated solvents limit battery viability. Here we designed a series of fluorine-free solvents through the methylation of 1,2-dimethoxyethane, which promotes inorganic LiF-rich interphase formation through anion reduction and achieves high oxidation stability. The anion-derived LiF interphases suppress lithium dendrite growth on the lithium anode and minimize cathode cracking under high-voltage operation. The Li+-solvent structure is investigated through in situ techniques and simulations to draw correlations between the interphase compositions and electrochemical performances. The methylation strategy provides an alternative pathway for electrolyte engineering towards high-voltage electrolytes while reducing dependence on expensive fluorinated solvents.
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Affiliation(s)
- Ai-Min Li
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, USA
| | - Oleg Borodin
- Battery Science Branch, DEVCOM Army Research Laboratory, Adelphi, MD, USA
| | - Travis P Pollard
- Battery Science Branch, DEVCOM Army Research Laboratory, Adelphi, MD, USA
| | - Weiran Zhang
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, USA
| | - Nan Zhang
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, USA
| | - Sha Tan
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, USA
| | - Fu Chen
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA
| | | | - Brett L Lucht
- Department of Chemistry, University of Rhode Island, Kingston, RI, USA
| | - Enyuan Hu
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, USA
| | - Xiao-Qing Yang
- Chemistry Division, Brookhaven National Laboratory, Upton, NY, USA
| | - Chunsheng Wang
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, USA.
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4
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Doyle E, Mirmira P, Ma P, Vu MC, Hixson-Wells T, Kumar R, Amanchukwu CV. Phase Morphology Dependence of Ionic Conductivity and Oxidative Stability in Fluorinated Ether Solid-State Electrolytes. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2024; 36:5063-5076. [PMID: 38828186 PMCID: PMC11137829 DOI: 10.1021/acs.chemmater.4c00199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 04/28/2024] [Accepted: 04/29/2024] [Indexed: 06/05/2024]
Abstract
Solid-state polymer electrolytes can enable the safe operation of high energy density lithium metal batteries; unfortunately, they have low ionic conductivity and poor redox stability at electrode interfaces. Fluorinated ether polymer electrolytes are a promising approach because the ether units can solvate and conduct ions, while the fluorinated moieties can increase oxidative stability. However, current perfluoropolyether (PFPE) electrolytes exhibit deficient lithium-ion coordination and ion transport. Here, we incorporate cross-linked poly(ethylene glycol) (PEG) units within the PFPE matrix and increase the polymer blend electrolyte conductivity by 6 orders of magnitude as compared to pure PFPE at 60 °C from 1.55 × 10-11 to 2.26 × 10-5 S/cm. Blending varying ratios of PEG and PFPE induces microscale phase separation, and we show the impact of morphology on ion solvation and dynamics in the electrolyte. Spectroscopy and simulations show weak ion-PFPE interactions, which promote salt phase segregation into-and ion transport within-the PEG domain. These polymer electrolytes show promise for use in high-voltage lithium metal batteries with improved Li|Li cycling due to enhanced mechanical properties and high-voltage stability beyond 6 V versus Li/Li+. Our work provides insights into transport and stability in fluorinated polymer electrolytes for next-generation batteries.
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Affiliation(s)
- Emily
S. Doyle
- Pritzker School of Molecular
Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Priyadarshini Mirmira
- Pritzker School of Molecular
Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Peiyuan Ma
- Pritzker School of Molecular
Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Minh Canh Vu
- Pritzker School of Molecular
Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Trinity Hixson-Wells
- Pritzker School of Molecular
Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Ritesh Kumar
- Pritzker School of Molecular
Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Chibueze V. Amanchukwu
- Pritzker School of Molecular
Engineering, University of Chicago, Chicago, Illinois 60637, United States
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5
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Ruan D, Cui Z, Fan J, Wang D, Wu Y, Ren X. Recent advances in electrolyte molecular design for alkali metal batteries. Chem Sci 2024; 15:4238-4274. [PMID: 38516064 PMCID: PMC10952095 DOI: 10.1039/d3sc06650a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 02/06/2024] [Indexed: 03/23/2024] Open
Abstract
In response to societal developments and the growing demand for high-energy-density battery systems, alkali metal batteries (AMBs) have emerged as promising candidates for next-generation energy storage. Despite their high theoretical specific capacity and output voltage, AMBs face critical challenges related to high reactivity with electrolytes and unstable interphases. This review, from the perspective of electrolytes, analyzes AMB failure mechanisms, including interfacial side reactions, active materials loss, and metal dendrite growth. It then reviews recent advances in innovative electrolyte molecular designs, such as ether, ester, sulfone, sulfonamide, phosphate, and salt, aimed at overcoming the above-mentioned challenges. Finally, we propose the current molecular design principles and future promising directions that can help future precise electrolyte molecular design.
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Affiliation(s)
- Digen Ruan
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 China
| | - Zhuangzhuang Cui
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 China
| | - Jiajia Fan
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 China
| | - Dazhuang Wang
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 China
| | - Yiying Wu
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Xiaodi Ren
- Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 China
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6
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Wu LQ, Li Z, Fan ZY, Li K, Li J, Huang D, Li A, Yang Y, Xie W, Zhao Q. Unveiling the Role of Fluorination in Hexacyclic Coordinated Ether Electrolytes for High-Voltage Lithium Metal Batteries. J Am Chem Soc 2024; 146:5964-5976. [PMID: 38381843 DOI: 10.1021/jacs.3c11798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Fluorinated ethers have become promising electrolyte solvent candidates for lithium metal batteries (LMBs) because they are endowed with high oxidative stability and high Coulombic efficiencies of lithium metal stripping/plating. Up to now, most reported fluorinated ether electrolytes are -CF3-based, and the influence of ion solvation in modifying degree of fluorination has not been well-elucidated. In this work, we synthesize a hexacyclic coordinated ether (1-methoxy-3-ethoxypropane, EMP) and its fluorinated ether counterparts with -CH2F (F1EMP), -CHF2 (F2EMP), or -CF3 (F3EMP) as terminal group. With lithium bis(fluorosulfonyl)imide as single salt, the solvation structure, Li-ion transport behavior, lithium deposition kinetics, and high-voltage stability of the electrolytes were systematically studied. Theoretical calculations and spectra reveal the gradually reduced solvating power from nonfluorinated EMP to fully fluorinated F3EMP, which leads to decreased ionic conductivity. In contrast, the weakly solvating fluorinated ethers possess higher Li+ transference number and exchange current density. Overall, partially fluorinated -CHF2 is demonstrated as the desired group. Further full cell testing using high-voltage (4.4 V) and high-loading (3.885 mAh cm-2) LiNi0.8Co0.1Mn0.1O2 cathode demonstrates that F2EMP electrolyte enables 80% capacity retention after 168 cycles under limited Li (50 μm) and lean electrolyte (5 mL Ah-1) conditions and 129 cycles under extremely lean electrolyte (1.8 mL Ah-1) and the anode-free conditions. This work deepens the fundamental understanding on the ion transport and interphase dynamics under various degrees of fluorination and provides a feasible approach toward the design of fluorinated ether electrolytes for practical high-voltage LMBs.
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Affiliation(s)
- Lan-Qing Wu
- Frontiers Science Center for New Organic Matter, Renewable Energy Conversion and Storage Center (RECAST), Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhe Li
- Frontiers Science Center for New Organic Matter, Renewable Energy Conversion and Storage Center (RECAST), Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhen-Yu Fan
- Frontiers Science Center for New Organic Matter, Renewable Energy Conversion and Storage Center (RECAST), Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Kun Li
- Frontiers Science Center for New Organic Matter, Renewable Energy Conversion and Storage Center (RECAST), Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jia Li
- Frontiers Science Center for New Organic Matter, Renewable Energy Conversion and Storage Center (RECAST), Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Dubin Huang
- Beijing Golden Feather New Energy Technology Co., Ltd, Beijing 100080, China
| | - Aijun Li
- Beijing Golden Feather New Energy Technology Co., Ltd, Beijing 100080, China
| | - Yang Yang
- Beijing Golden Feather New Energy Technology Co., Ltd, Beijing 100080, China
| | - Weiwei Xie
- Frontiers Science Center for New Organic Matter, Renewable Energy Conversion and Storage Center (RECAST), Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
| | - Qing Zhao
- Frontiers Science Center for New Organic Matter, Renewable Energy Conversion and Storage Center (RECAST), Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
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7
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Xu J, Koverga V, Phan A, Min Li A, Zhang N, Baek M, Jayawardana C, Lucht BL, Ngo AT, Wang C. Revealing the Anion-Solvent Interaction for Ultralow Temperature Lithium Metal Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2306462. [PMID: 38013502 DOI: 10.1002/adma.202306462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 11/07/2023] [Indexed: 11/29/2023]
Abstract
Anion solvation in electrolytes can largely change the electrochemical performance of the electrolytes, yet has been rarely investigated. Herein, three anions of bis(trifluoromethanesulfonyl)imide (TFSI), bis(fluorosulfonyl)imide (FSI), and derived asymmetric (fluorosulfonyl)(trifluoro-methanesulfonyl)imide (FTFSI) are systematically examined in a weakly Li+ cation solvating solvent of bis(3-fluoropropyl)ether (BFPE). In-situ liquid secondary ion mass spectrometry demonstrates that FTFSI- and FSI- anions are associated with BFPE solvent, while weak TFSI- /BFPE cluster signals are detected. Molecular modeling further reveals that the anion-solvent interaction is accompanied by the formation of H-bonding-like interactions. Anion solvation enhances the Li+ cation transfer number and reduces the organic component in solid electrolyte interphase, which enhances the Li plating/stripping Coulombic efficiency at a low temperature of -30 °C from 42.4% in TFSI-based electrolytes to 98.7% in 1.5 m LiFTFSI and 97.9% in LiFSI-BFPE electrolytes. The anion-solvent interactions, especially asymmetric anion solvation also accelerate the Li+ desolvation kinetics. The 1.5 m LiFTFSI-BFPE electrolyte with strong anion-solvent interaction enables LiNi0.8 Mn0.1 Co0.1 O2 (NMC811)||Li (20 µm) full cell with stable cyclability even under -40 °C, retaining over 92% of initial capacity (115 mAh g-1 , after 100 cycles). The anion-solvent interactions insights allow to rational design the electrolyte for lithium metal batteries and beyond to achieve high performance.
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Affiliation(s)
- Jijian Xu
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20742, USA
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Volodymyr Koverga
- Department of Chemical Engineering, University of Illinois Chicago, Chicago, IL, 60608, USA
- Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - An Phan
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Ai Min Li
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Nan Zhang
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Minsung Baek
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Chamithri Jayawardana
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island, 02881, USA
| | - Brett L Lucht
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island, 02881, USA
| | - Anh T Ngo
- Department of Chemical Engineering, University of Illinois Chicago, Chicago, IL, 60608, USA
- Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Chunsheng Wang
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20742, USA
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8
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Jiang Z, Deng Y, Mo J, Zhang Q, Zeng Z, Li Y, Xie J. Switching Reaction Pathway of Medium-Concentration Ether Electrolytes to Achieve 4.5 V Lithium Metal Batteries. NANO LETTERS 2023; 23:8481-8489. [PMID: 37669545 DOI: 10.1021/acs.nanolett.3c02013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Pursuing high-energy-density lithium metal batteries (LMBs) necessitates the advancement of electrolytes. Despite demonstrating high compatibility with lithium metal anodes (LMAs), ether-based electrolytes face challenges in achieving stable cycling at high voltages. Herein, we propose a strategy to enhance the high-voltage stability of medium-concentration (∼1 M) ether electrolytes by altering the reaction pathway of ether solvents. By employing a 1 M lithium difluoro(oxalato)borate in dimethoxyethane (LiDFOB/DME) electrolyte, we observed that LiDFOB displays a pronounced tendency for decomposition over DME, leading to a modification in the decomposition pathway of DME. This modification facilitates the formation of a stable organic-inorganic hybrid interface. Utilizing such an electrolyte, the Li-LCO cell demonstrates a discharge specific capacity of 146 mAh g-1 (5 C) and maintains retention of 86% over 1000 cycles at 2 C under a 4.5 V cutoff voltage. Additionally, the optimized ether electrolyte demonstrated outstanding cycling performance in Li-LCO full cells under practical conditions.
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Affiliation(s)
- Zhipeng Jiang
- School of Materials Science and Engineering, Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, Anhui University of Technology, Maanshan 243002, China
| | - Yu Deng
- School of Materials Science and Engineering, Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, Anhui University of Technology, Maanshan 243002, China
| | - Jisheng Mo
- School of Materials Science and Engineering, Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, Anhui University of Technology, Maanshan 243002, China
| | - Qingan Zhang
- School of Materials Science and Engineering, Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, Anhui University of Technology, Maanshan 243002, China
| | - Ziqi Zeng
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yongtao Li
- School of Materials Science and Engineering, Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, Anhui University of Technology, Maanshan 243002, China
| | - Jia Xie
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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9
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Mistry A, Yu Z, Peters BL, Fang C, Wang R, Curtiss LA, Balsara NP, Cheng L, Srinivasan V. Toward Bottom-Up Understanding of Transport in Concentrated Battery Electrolytes. ACS CENTRAL SCIENCE 2022; 8:880-890. [PMID: 35912355 PMCID: PMC9335914 DOI: 10.1021/acscentsci.2c00348] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Bottom-up understanding of transport describes how molecular changes alter species concentrations and electrolyte voltage drops in operating batteries. Such an understanding is essential to predictively design electrolytes for desired transport behavior. We herein advocate building a structure-property-performance relationship as a systematic approach to accurate bottom-up understanding. To ensure generalization across salt concentrations as well as different electrolyte types and cell configurations, the property-performance relation must be described using Newman's concentrated solution theory. It uses Stefan-Maxwell diffusivity, ij , to describe the role of molecular motions at the continuum scale. The key challenge is to connect ij to the structure. We discuss existing methods for making such a connection, their peculiarities, and future directions to advance our understanding of electrolyte transport.
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Affiliation(s)
- Aashutosh Mistry
- Chemical
Sciences and Engineering, Argonne National
Laboratory, Lemont, Illinois 60439, United States
- Joint
Center for Energy Storage Research, Argonne
National Laboratory, Lemont, Illinois 60439, United States
| | - Zhou Yu
- Joint
Center for Energy Storage Research, Argonne
National Laboratory, Lemont, Illinois 60439, United States
- Materials
Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Brandon L. Peters
- Joint
Center for Energy Storage Research, Argonne
National Laboratory, Lemont, Illinois 60439, United States
- Materials
Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Chao Fang
- Department
of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Joint Center
for Energy Storage Research, Lawrence Berkeley
National Laboratory, Berkeley, California 94720, United States
| | - Rui Wang
- Department
of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Joint Center
for Energy Storage Research, Lawrence Berkeley
National Laboratory, Berkeley, California 94720, United States
| | - Larry A. Curtiss
- Joint
Center for Energy Storage Research, Argonne
National Laboratory, Lemont, Illinois 60439, United States
- Materials
Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Nitash P. Balsara
- Department
of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Joint Center
for Energy Storage Research, Lawrence Berkeley
National Laboratory, Berkeley, California 94720, United States
| | - Lei Cheng
- Joint
Center for Energy Storage Research, Argonne
National Laboratory, Lemont, Illinois 60439, United States
- Materials
Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Venkat Srinivasan
- Chemical
Sciences and Engineering, Argonne National
Laboratory, Lemont, Illinois 60439, United States
- Joint
Center for Energy Storage Research, Argonne
National Laboratory, Lemont, Illinois 60439, United States
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10
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Wang Y, Chen D. Application of Advanced Vibrational Spectroscopy in Revealing Critical Chemical Processes and Phenomena of Electrochemical Energy Storage and Conversion. ACS APPLIED MATERIALS & INTERFACES 2022; 14:23033-23055. [PMID: 35130433 DOI: 10.1021/acsami.1c20893] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The future of the energy industry and green transportation critically relies on exploration of high-performance, reliable, low-cost, and environmentally friendly energy storage and conversion materials. Understanding the chemical processes and phenomena involved in electrochemical energy storage and conversion is the premise of a revolutionary materials discovery. In this article, we review the recent advancements of application of state-of-the-art vibrational spectroscopic techniques in unraveling the nature of electrochemical energy, including bulk energy storage, dynamics of liquid electrolytes, interfacial processes, etc. Technique-wise, the review covers a wide range of spectroscopic methods, including classic vibrational spectroscopy (direct infrared absorption and Raman scattering), external field enhanced spectroscopy (surface enhanced Raman and IR, tip enhanced Raman, and near-field IR), and two-photon techniques (2D infrared absorption, stimulated Raman, and vibrational sum frequency generation). Finally, we provide perspectives on future directions in refining vibrational spectroscopy to contribute to the research frontier of electrochemical energy storage and conversion.
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Affiliation(s)
- You Wang
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Dongchang Chen
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
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11
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Ketkar PM, Epps TH. Nanostructured Block Polymer Electrolytes: Tailoring Self-Assembly to Unlock the Potential in Lithium-Ion Batteries. Acc Chem Res 2021; 54:4342-4353. [PMID: 34783520 DOI: 10.1021/acs.accounts.1c00468] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
ConspectusIon-containing solid block polymer (BP) electrolytes can self-assemble into microphase-separated domains to facilitate the independent optimization of ion conduction and mechanical stability; this assembly behavior has the potential to improve the functionality and safety of lithium-ion batteries over liquid electrolytes to meet future demands (e.g., large capacities and long lifetimes) in various applications. However, significant enhancements in the ionic conductivity and processability of BPs must be realized for BP-based electrolytes to become robust alternatives in commercial devices. Toward this end, the controlled modification of BP electrolytes' intra-domain (nanometer-scale) and multi-grain (micrometer-scale) structure is one viable approach; intra-domain ion transport and segmental compatibility (related to the effective Flory-Huggins parameter, χeff) can be increased by tuning the ion and monomer-segment distributions, and the morphology can be selected such that the multi-grain transport is less sensitive to grain size and orientation.To highlight the characteristics of intra-domain structure that promote efficient ion transport, this Account begins by describing the relationship between BP thermodynamics (namely, χeff and the statistical segment length, b, which is indicative of chain stiffness) and local ion concentration. These thermodynamic insights are vital because they inform the selection of synthesis and formulation variables, such as polymer and ion chemistry, polymer molecular weight and composition, and ion concentration, which boost electrolyte performance. In addition to its relationship with local ion transport, χeff is also an important factor with respect to electrolyte processability. For example, a reduced χeff can allow BP electrolytes to be processed at lower temperatures (i.e., lower energy input), with less solvent (i.e., reduced waste), and/or for shorter times (i.e., higher throughput) yet still form desired nanostructures. This Account also examines the impact of electrolyte preparation and processing on the ion transport across nanostructured grains because of grain size and orientation. As morphologies with a 3D-connected versus 2D-connected conducting phase show different sensitivities to conductivity losses that can occur because of the fabrication methods, it is necessary to account for electrolyte processing effects when probing ion transport.The intra-domain and micrometer-scale structure also can be tuned using either tapered BPs (macromolecules with modified monomer-segment composition profiles between two homogeneous blocks) or blends of BPs and homopolymers, independent of the BP molecular weight and composition, as detailed herein. The application of TBPs or BP/HP blends as ion-conducting materials leads to improved ion transport, reduced χeff, and greater availability of morphologies with 3D connectivity relative to traditional (non-tapered and unblended) BP electrolytes. This feature results from the fact that ion transport is related more closely to the monomer-segment distributions within a domain than the overall nanoscale morphology or average polymer/ion mobilities. Taken together, this Account describes how ion transport and processability are influenced by BP architecture and nanostructural features, and it provides avenues to tune nanoassemblies that can contribute to improved lithium-ion battery technologies to meet future demands.
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