1
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Zhang C, Li C, Zhang K, Zhang S, Liu J, Wang M, Wang L. Building Flame-Retardant Polymer Electrolytes via Microcapsule Technology for Stable Lithium Batteries. ACS APPLIED MATERIALS & INTERFACES 2024; 16:27470-27480. [PMID: 38742958 DOI: 10.1021/acsami.4c04154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Flame retardants could improve the safety properties of lithium batteries (LBs) with the sacrifice of electrochemical performance due to parasitic reactions. To concur with this, we designed thermal-response clothes for hexachlorophosphazene (HCP) additives by the microcapsule technique with urea-formaldehyde (UF) resin as the shell. HCP@UF combines with polyacrylonitrile (PAN) by hydrogen bonds successfully to form PAN-HCP@UF as the flame-retardant solid polymer electrolyte. The hydrogen bonds ensure excellent mechanical properties of the polymer electrolyte. The multiscale free radical-annihilating agent HCP effectively eliminates hydrogen free radicals of electrolytes under high temperature, showing excellent flame retardation. During the operation of the battery, functional groups on the UF resin act as active sites to promote the migration of lithium ions, while the internal HCP is protected from electrochemical reaction. With 25% HCP@UF addition, the limiting oxygen index of the PAN-HCP@UF increases to 28% and the Li+ transfer number up to 0.80. By UF protection, the initial capacity retention rate of the Li||LFP battery that assembles with PAN-HCP@UF is 88.8% after 500 cycles at 0.5 C. Thus, the microcapsule-encapsulated approach is deemed to provide an innovative strategy to prepare high-safety solid-state LB with a stable long cycle life.
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Affiliation(s)
- Chao Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Caixia Li
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Kai Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Shenghao Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jingwen Liu
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Minghui Wang
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Lei Wang
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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2
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Lan K, Zhang X, Yang X, Hou Q, Yuan R, Zheng M, Fan J, Qiu X, Dong Q. A Hybrid-Salt Strategy for Modulating the Li + Solvation Sheathes and Constructing Robust SEI in Non-Flammable Electrolyte Lithium Metal Batteries. CHEMSUSCHEM 2024:e202400210. [PMID: 38511253 DOI: 10.1002/cssc.202400210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 03/01/2024] [Accepted: 03/20/2024] [Indexed: 03/22/2024]
Abstract
The electrode interface determines the performance of an electrochemical energy storage system. Using traditional electrolyte organic additives and high-concentration electrolyte emerging recently are two generally strategies for improving the electrode interface. Here, a hybrid-salt electrolyte strategy is proposed for constructing the stable electrode interface. Through the solubilization effect of phosphate ester on LiNO3, a hybrid-salts-based non-flammable phosphate ester electrolyte system (HSPE) with LiPF6 and LiNO3 as Li salts has been developed. By the strong interaction between NO3 - and Li+, the Li+ solvation sheath and solvent behaviors have been modulated, thus the undesirable effects of phosphate ester are eliminated and a robust SEI is formed. Experimental results and theoretical calculations illustrate that NO3 - as a kind of strongly coordinating anion can reduce the number of TEP molecules and lower the reduction reactivity of TEP. The reconfigured Li+ solvation structure allows the formation of an inorganic-rich SEI on the electrode surface. As a result, in the designed HSPE, the average coulombic efficiency of lithium plating/stripping is increased to 99.12 %. This work explored a new approach to construct the electrode interface and addressing the poor interface performance issue of phosphate esters.
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Affiliation(s)
- Kai Lan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Xinan Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Xinxin Yang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Qing Hou
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Ruming Yuan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Mingseng Zheng
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Jingmin Fan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Xinping Qiu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Quanfeng Dong
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
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3
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Luo J, Yang M, Wang D, Zhang J, Song K, Tang G, Xie Z, Guo X, Shi Y, Chen W. A Fast Na-Ion Conduction Polymer Electrolyte via Triangular Synergy Strategy for Quasi-Solid-State Batteries. Angew Chem Int Ed Engl 2023; 62:e202315076. [PMID: 37960950 DOI: 10.1002/anie.202315076] [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: 10/07/2023] [Revised: 11/12/2023] [Accepted: 11/13/2023] [Indexed: 11/15/2023]
Abstract
Polymer electrolytes provide a visible pathway for the construction of high-safety quasi-solid-state batteries due to their high interface compatibility and processability. Nevertheless, sluggish ion transfer at room temperature seriously limits their applications. Herein, a triangular synergy strategy is proposed to accelerate Na-ion conduction via the cooperation of polymer-salt, ionic liquid, and electron-rich additive. Especially, PVDF-HFP and NaTFSI salt acted as the framework to stably accommodate all the ingredients. An ionic liquid (Emim+ -FSI- ) softened the polymer chains through a weakening molecule force and offered additional liquid pathways for ion transport. Physicochemical characterizations and theoretical calculations demonstrated that electron-rich Nerolin with π-cation interaction facilitated the dissociation of NaTFSI and effectively restrained the competitive migration of large cations from EmimFSI, thus lowering the energy barrier for ion transport. The strategy resulted in a thin F-rich interphase dominated by NaTFSI salt's decomposition, enabling rapid Na+ transmission across the interface. These combined effects resulted in a polymer electrolyte with high ionic conductivity (1.37×10-3 S cm-1 ) and tNa+ (0.79) at 25 °C. The assembled cells delivered reliable rate capability and stability (200 cycles, 99.2 %, 0.5 C) with a good safety performance.
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Affiliation(s)
- Jun Luo
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
| | - Mingrui Yang
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
| | - Denghui Wang
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
| | - Jiyu Zhang
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
| | - Keming Song
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
| | - Guochuan Tang
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
| | - Zhengkun Xie
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
| | - Xiaoniu Guo
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
| | - Yu Shi
- Leeds Institute of Textiles and Colour (LITAC), School of Design, Woodhouse Lane, University of Leeds, Leeds, LS2 9JT, UK
| | - Weihua Chen
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Zhengzhou University, Zhengzhou, 450002, Henan, P. R. China
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4
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Li A, Man Y, Liao J, Duan L, Ji X, Zhou X. KI-Assisted Formation of Spindle-like Prussian White Nanoparticles for High-Performance Potassium-Ion Battery Cathodes. NANO LETTERS 2023; 23:10066-10073. [PMID: 37846924 DOI: 10.1021/acs.nanolett.3c03558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Prussian white (PW) is considered as a promising cathode material for potassium-ion batteries (KIBs) due to its low cost and high theoretical capacity. However, the high water content and structural defects and the strict synthesis conditions of PW lead to its unsatisfactory cycling performance and low specific capacity, hindering its practical applications. Herein, a template-engaged reduction method is proposed, using MIL-88B(Fe) as a self-template and KI as the reducing agent to prepare K-rich PW with low defects and water content. Furthermore, the hierarchical porous spindle-like morphology can be inherited from the precursor, furnishing sufficient active sites and reducing the ion diffusion path. Consequently, when applied as a KIB cathode material, spindle-like PW (K1.72Fe[Fe(CN)6]0.96·0.342H2O) manifested remarkable potassium storage properties. Notably, a full cell assembled by the spindle-like PW cathode and graphite anode exhibited a large energy density of ∼216.7 Wh kg-1, demonstrating its huge potential for energy storage systems.
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Affiliation(s)
- An Li
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Yuehua Man
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Jiaying Liao
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Liping Duan
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Xiulei Ji
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Xiaosi Zhou
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
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5
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Li H, Zhao R, Zhou W, Wang L, Li W, Zhao D, Chao D. Trade-off between Zincophilicity and Zincophobicity: Toward Stable Zn-Based Aqueous Batteries. JACS AU 2023; 3:2107-2116. [PMID: 37654583 PMCID: PMC10466346 DOI: 10.1021/jacsau.3c00292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/11/2023] [Accepted: 07/14/2023] [Indexed: 09/02/2023]
Abstract
Zn-based aqueous batteries (ZABs) hold great promise for large-scale energy storage applications due to the merits of intrinsic safety and low cost. Nevertheless, the thorny issues of metallic Zn anodes, including dendrite growth and parasitic side reactions, have severely limited the application of ZABs. Despite the encouraging improvements for stabilizing Zn anodes through surface modification, electrolyte optimization, and structural design, fundamentally addressing the inherent thermodynamics and kinetics obstacles of Zn anodes remains crucial in realizing reliable ZABs with ultrahigh efficiency, capacity, and cyclability. The target of this perspective is to elucidate the prominent status of Zn metal anode electrochemistry first from the perspective of zincophilicity and zincophobicity. Recent progress in ZABs is critically appraised for addressing the key issues, with special emphasis on the trade-off between zincophilic and zincophobic electrochemistry. Challenges and prospects for further exploration of a reliable Zn anode are presented, which are expected to boost in-depth research and practical applications of advanced ZABs.
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Affiliation(s)
- Hongpeng Li
- Laboratory
of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis
and Innovative Materials, and School of Chemistry and Materials, Fudan University, Shanghai 200433, China
- College
of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
| | - Ruizheng Zhao
- Laboratory
of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis
and Innovative Materials, and School of Chemistry and Materials, Fudan University, Shanghai 200433, China
- Interdisciplinary
Research Center for Sustainable Energy Science and Engineering (IRC4SE), School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Wanhai Zhou
- Laboratory
of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis
and Innovative Materials, and School of Chemistry and Materials, Fudan University, Shanghai 200433, China
| | - Lipeng Wang
- Laboratory
of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis
and Innovative Materials, and School of Chemistry and Materials, Fudan University, Shanghai 200433, China
| | - Wei Li
- Laboratory
of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis
and Innovative Materials, and School of Chemistry and Materials, Fudan University, Shanghai 200433, China
| | - Dongyuan Zhao
- Laboratory
of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis
and Innovative Materials, and School of Chemistry and Materials, Fudan University, Shanghai 200433, China
| | - Dongliang Chao
- Laboratory
of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis
and Innovative Materials, and School of Chemistry and Materials, Fudan University, Shanghai 200433, China
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6
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Liu X, Zheng X, Dai Y, Li B, Wen J, Zhao T, Luo W. Suppression of Interphase Dissolution Via Solvent Molecule Tuning for Sodium Metal Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2304256. [PMID: 37501280 DOI: 10.1002/adma.202304256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 07/06/2023] [Indexed: 07/29/2023]
Abstract
Solvent molecule tuning is used to alter the redox potentials of solvents or ion-solvent binding energy for high-voltage or low-temperature electrolytes. Herein, an electrolyte design strategy that effectively suppresses solid electrolyte interphase (SEI) dissolution and passivates highly-reactive metallic Na anode via solvent molecule tuning is proposed. With rationally lengthened phosphate backbones with ─CH2 ─ units, the low-solvation tris(2-ethylhexyl) phosphate (TOP) molecule effectively weakens the solvation ability of carbonate-based electrolytes, reduces the free solvent ratio, and enables an anion-enriched primary Na+ ion solvation sheath. The decreased free solvent and compact lower-solubility interphase established in this electrolyte prevent electrodes from continuous SEI dissolution and parasitic reactions at both room temperature (RT) and high temperature (HT). As a result, the Na/Na3 V2 (PO4 )3 cell with the new electrolyte achieves impressive cycling stability of 95.7% capacity retention after 1800 cycles at 25 °C and 62.1% capacity retention after 700 cycles at 60 °C. Moreover, the TOP molecule not only maintains the nonflammable feature of phosphate but also attains higher thermal stability, which endows the electrolyte with high safety and thermal stability. This design concept for electrolytes offers a promising path to long-cycling and high-safety sodium metal batteries.
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Affiliation(s)
- Xuyang Liu
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Xueying Zheng
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Yiming Dai
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Bin Li
- School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Jiayun Wen
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Tong Zhao
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| | - Wei Luo
- Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
- Institute of Carbon Neutrality, Tongji University, Shanghai, 201804, China
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7
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Fu S, Xie X, Huangyang X, Yang L, Zeng X, Ma Q, Wu X, Xiao M, Wu Y. Ameliorating Phosphonic-Based Nonflammable Electrolytes Towards Safe and Stable Lithium Metal Batteries. Molecules 2023; 28:molecules28104106. [PMID: 37241847 DOI: 10.3390/molecules28104106] [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: 03/17/2023] [Revised: 04/26/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023] Open
Abstract
High-energy-density lithium metal batteries with high safety and stability are urgently needed. Designing the novel nonflammable electrolytes possessing superior interface compatibility and stability is critical to achieve the stable cycling of battery. Herein, the functional additive dimethyl allyl-phosphate and fluoroethylene carbonate were introduced to triethyl phosphate electrolytes to stabilize the deposition of metallic lithium and accommodate the electrode-electrolyte interface. In comparison with traditional carbonate electrolyte, the designed electrolyte shows high thermostability and inflaming retarding characteristics. Meanwhile, the Li||Li symmetrical batteries with designed phosphonic-based electrolytes exhibit a superior cycling stability of 700 h at the condition of 0.2 mA cm-2, 0.2 mAh cm-2. Additionally, the smooth- and dense-deposited morphology was observed on an cycled Li anode surface, demonstrating that the designed electrolytes show better interface compatibility with metallic lithium anodes. The Li||LiNi0.8Co0.1Mn0.1O2 and Li||LiNi0.6Co0.2Mn0.2O2 batteries paired with phosphonic-based electrolytes show better cycling stability after 200 and 450 cycles at the rate of 0.2 C, respectively. Our work provides a new way to ameliorate nonflammable electrolytes in advanced energy storage systems.
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Affiliation(s)
- Sha Fu
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Xuanzhi Xie
- School of Mechanical and Electrical Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Xiaoyi Huangyang
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Longxi Yang
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Xianxiang Zeng
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Qiang Ma
- Henan International Joint lof Rare Earth Composite Materials, Henan University of Engineering, College of Materials Engineering, Zhengzhou 451191, China
| | - Xiongwei Wu
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Mingtao Xiao
- School of Mechanical and Electrical Engineering, Hunan Agricultural University, Changsha 410128, China
| | - Yuping Wu
- School of Energy and Environment, Southeast University, Nanjing 210096, China
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8
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Lu Y, Zhang W, Liu S, Cao Q, Yan S, Liu H, Hou W, Zhou P, Song X, Ou Y, Li Y, Liu K. Tuning the Li + Solvation Structure by a "Bulky Coordinating" Strategy Enables Nonflammable Electrolyte for Ultrahigh Voltage Lithium Metal Batteries. ACS NANO 2023; 17:9586-9599. [PMID: 37127844 DOI: 10.1021/acsnano.3c02948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In battery electrolyte design principles, tuning Li+ solvation structure is an effective way to connect electrolyte chemistry with interfacial chemistry. Although recent proposed solvation tuning strategies are able to improve battery cyclability, a comprehensive strategy for electrolyte design remains imperative. Here, we report a solvation tuning strategy by utilizing molecular steric effect to create a "bulky coordinating" structure. Based on this strategy, the designed electrolyte generates an inorganic-rich solid electrolyte interphase (SEI) and cathode-electrolyte interphase (CEI), leading to excellent compatibility with both Li metal anodes and high-voltage cathodes. Under an ultrahigh voltage of 4.6 V, Li/NMC811 full-cells (N/P = 2.0) hold an 84.1% capacity retention over 150 cycles and industrial Li/NMC811 pouch cells realize an energy density of 495 Wh kg-1. This study provides innovative insights into Li+ solvation tuning for electrolyte engineering and offers a promising path toward developing high-energy Li metal batteries.
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Affiliation(s)
- Yang Lu
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Weili Zhang
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
- Hefei institute for Public Safety Research, Tsinghua University, 230601, Hefei, China
| | - Shengzhou Liu
- Hefei institute for Public Safety Research, Tsinghua University, 230601, Hefei, China
| | - Qingbin Cao
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Shuaishuai Yan
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Hao Liu
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Wenhui Hou
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Pan Zhou
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Xuan Song
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Yu Ou
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Yong Li
- State Key Laboratory of Space Power-Sources Technology, 200000, Shanghai, China
| | - Kai Liu
- Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
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9
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Chen L, Nian Q, Ruan D, Fan J, Li Y, Chen S, Tan L, Luo X, Cui Z, Cheng Y, Li C, Ren X. High-safety and high-efficiency electrolyte design for 4.6 V-class lithium-ion batteries with a non-solvating flame-retardant. Chem Sci 2023; 14:1184-1193. [PMID: 36756331 PMCID: PMC9891389 DOI: 10.1039/d2sc05723a] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/28/2022] [Indexed: 12/29/2022] Open
Abstract
Nonflammable electrolytes are critical for the safe operation of high-voltage lithium-ion batteries (LIBs). Although organic phosphates are effective flame retardants, their poor electrochemical stability with a graphite (Gr) anode and Ni-rich cathodes would lead to the deterioration of electrode materials and fast capacity decay. Herein, we develop a safe and high-performance electrolyte formulation for high-voltage (4.6 V-class) LIBs using flame-retarding ethoxy(pentafluoro) cyclotriphosphazene (PFPN) as a non-solvating diluent for the high-concentration carbonate-ether hybrid electrolyte. In contrast to conventional nonflammable additives with restricted dosage, the high level of PFPN (69% mass ratio in our electrolyte design) could significantly increase the electrolyte flash point and protect the favored anion-rich inner solvation sheath because of its non-solvating feature, thus preventing solvent co-intercalation and structural damage to the Gr anode. The nonflammable electrolyte could also form a stable LiF-rich cathode electrolyte interphase (CEI), which enables superior electrochemical performances of Gr‖LiNi0.8Mn0.1Co0.1O2 (NMC811) full cells at high voltages (∼82.0% capacity retention after 1000 cycles at 4.5 V; 89.8% after 300 cycles at 4.6 V) and high temperatures (50 °C). This work sheds light on the electrolyte design and interphase engineering for developing practical safe high-energy-density LIBs.
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Affiliation(s)
- Li Chen
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China .,Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education Hefei 230601 China
| | - Qingshun Nian
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
| | - Digen Ruan
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
| | - Jiajia Fan
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
| | - Yecheng Li
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
| | - Shunqiang Chen
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
| | - Lijiang Tan
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
| | - Xuan Luo
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
| | - Zhuangzhuang Cui
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
| | - Yifeng Cheng
- State Grid Anhui Electric Power Research InstituteChina
| | - Changhao Li
- State Grid Anhui Electric Power Research InstituteChina
| | - Xiaodi Ren
- School of Chemistry and Materials Science, University of Science and Technology of China Anhui 230026 China
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10
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Shan X, Zhao S, Ma M, Pan Y, Xiao Z, Li B, Sokolov AP, Tian M, Yang H, Cao PF. Single-Ion Conducting Polymeric Protective Interlayer for Stable Solid Lithium-Metal Batteries. ACS APPLIED MATERIALS & INTERFACES 2022; 14:56110-56119. [PMID: 36490324 DOI: 10.1021/acsami.2c17547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
With many reported attempts on fabricating single-ion conducting polymer electrolytes, they still suffer from low ionic conductivity, narrow voltage window, and high cost. Herein, we report an unprecedented approach on improving the cationic transport number (tLi+) of the polymer electrolyte, i.e., single-ion conducting polymeric protective interlayer (SIPPI), which is designed between the conventional polymer electrolyte (PVEC) and Li-metal electrode. Satisfied ionic conductivity (1 mS cm-1, 30 °C), high tLi+ (0.79), and wide-area voltage stability are realized by coupling the SIPPI with the PVEC electrolyte. Benefiting from this unique design, the Li symmetrical cell with the SIPPI shows stable cycling over 6000 h at 3 mA cm-2, and the full cell with the SIPPI exhibits stable cycling performance with a capacity retention of 86% over 1000 cycles at 1 C and 25 °C. This incorporated SIPPI on the Li anode presents an alternative strategy for enabling high-energy density, long cycling lifetime, and safe and cost-effective solid-state batteries.
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Affiliation(s)
- Xinyuan Shan
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| | - Sheng Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Mengxiang Ma
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yiyang Pan
- School of Chemistry, Beihang University, Beijing 10019, China
| | - Zhenxue Xiao
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
| | - Bingrui Li
- The Bredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Alexei P Sokolov
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Ming Tian
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Huabin Yang
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300350, China
| | - Peng-Fei Cao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
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