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Shi L, Anderson CS, Mishra L, Qiao H, Canfield N, Xu Y, Wang C, Jang T, Yu Z, Feng S, Le PM, Subramanian VR, Wang C, Liu J, Xiao J, Lu D. Early Failure of Lithium-Sulfur Batteries at Practical Conditions: Crosstalk between Sulfur Cathode and Lithium Anode. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201640. [PMID: 35524632 PMCID: PMC9313511 DOI: 10.1002/advs.202201640] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/20/2022] [Indexed: 05/20/2023]
Abstract
Lithium-sulfur (Li-S) batteries are one of the most promising next-generation energy storage technologies due to their high theoretical energy and low cost. However, Li-S cells with practically high energy still suffer from a very limited cycle life with reasons which remain unclear. Here, through cell study under practical conditions, it is proved that an internal short circuit (ISC) is a root cause of early cell failure and is ascribed to the crosstalk between the S cathode and Li anode. The cathode topography affects S reactions through influencing the local resistance and electrolyte distribution, particularly under lean electrolyte conditions. The inhomogeneous reactions of S cathodes are easily mirrored by the Li anodes, resulting in exaggerated localized Li plating/stripping, Li filament formation, and eventually cell ISC. Manipulating cathode topography is proven effective to extend the cell cycle life under practical conditions. The findings of this work shed new light on the electrode design for extending cycle life of high-energy Li-S cells, which are also applicable for other rechargeable Li or metal batteries.
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Affiliation(s)
- Lili Shi
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Cassidy S. Anderson
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Lubhani Mishra
- Walker Department of Mechanical EngineeringTexas Materials InstituteThe University of Texas at AustinAustinTX78712USA
| | - Hong Qiao
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Nathan Canfield
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Yaobin Xu
- Environmental Molecular Sciences LaboratoryPacific Northwest National LaboratoryRichlandWA99352USA
| | - Chengqi Wang
- Department of Nuclear Engineering and Radiological SciencesUniversity of MichiganAnn ArborMI48109USA
| | - TaeJin Jang
- Materials Science and Engineering ProgramTexas Materials InstituteThe University of Texas at AustinAustinTX78712USA
| | - Zhaoxin Yu
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Shuo Feng
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Phung M Le
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Venkat R. Subramanian
- Walker Department of Mechanical EngineeringTexas Materials InstituteThe University of Texas at AustinAustinTX78712USA
- Materials Science and Engineering ProgramTexas Materials InstituteThe University of Texas at AustinAustinTX78712USA
| | - Chongmin Wang
- Environmental Molecular Sciences LaboratoryPacific Northwest National LaboratoryRichlandWA99352USA
| | - Jun Liu
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Jie Xiao
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
| | - Dongping Lu
- Energy and Environment DirectoratePacific Northwest National LaboratoryRichlandWA99354USA
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2
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Xu R, Tang H, Zhou Y, Wang F, Wang H, Shao M, Li C, Wei Z. Enhanced Catalysis of LIS 3· Radical-to-Polysulfide Interconversion via Increased Sulfur Vacancies in Lithium–Sulfur Batteries. Chem Sci 2022; 13:6224-6232. [PMID: 35733903 PMCID: PMC9159087 DOI: 10.1039/d2sc01353c] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 05/08/2022] [Indexed: 11/25/2022] Open
Abstract
The practical application of lithium–sulfur (Li–S) batteries is seriously hindered by severe lithium polysulfide (LiPS) shuttling and sluggish electrochemical conversions. Herein, the Co9S8/MoS2 heterojunction as a model cathode host material is employed to discuss the performance improvement strategy and elucidate the catalytic mechanism. The introduction of sulfur vacancies can harmonize the chemisorption of the heterojunction component. Also, sulfur vacancies induce the generation of radicals, which participate in a liquidus disproportionated reaction to reduce the accumulation of liquid LiPSs. To assess the conversion efficiency from liquid LiPSs to solid Li2S, a new descriptor calculated from basic cyclic voltammetry curves, nucleation transformation ratio, is proposed. Sulfur vacancies can harmonize chemisorption and generate amounts of radicals to boost the conversions of LiPSs.![]()
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Affiliation(s)
- Rui Xu
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University Shazhengjie 174 Chongqing 400044 China
| | - Hongan Tang
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University Shazhengjie 174 Chongqing 400044 China
| | - Yuanyuan Zhou
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University Shazhengjie 174 Chongqing 400044 China
| | - Fangzheng Wang
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University Shazhengjie 174 Chongqing 400044 China
| | - Hongrui Wang
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University Shazhengjie 174 Chongqing 400044 China
| | - Minhua Shao
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong
| | - Cunpu Li
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University Shazhengjie 174 Chongqing 400044 China
| | - Zidong Wei
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry and Chemical Engineering, Chongqing University Shazhengjie 174 Chongqing 400044 China
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3
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Wang WP, Zhang J, Yin YX, Duan H, Chou J, Li SY, Yan M, Xin S, Guo YG. A Rational Reconfiguration of Electrolyte for High-Energy and Long-Life Lithium-Chalcogen Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2000302. [PMID: 32363631 DOI: 10.1002/adma.202000302] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 06/11/2023]
Abstract
Lithium-chalcogen batteries are an appealing choice for high-energy-storage technology. However, the traditional battery that employs liquid electrolytes suffers irreversible loss and shuttle of the soluble intermediates. New batteries that adopt Li+ -conductive polymer electrolytes to mitigate the shuttle problem are hindered by incomplete discharge of sulfur/selenium. To address the trade-off between energy and cycle life, a new electrolyte is proposed that reconciles the merits of liquid and polymer electrolytes while resolving each of their inferiorities. An in situ interfacial polymerization strategy is developed to create a liquid/polymer hybrid electrolyte between a LiPF6 -coated separator and the cathode. A polymer-gel electrolyte in situ formed on the separator shows high Li+ transfer number to serve as a chemical barrier against the shuttle effect. Between the gel electrolyte and the cathode surface is a thin gradient solidification layer that enables transformation from gel to liquid so that the liquid electrolyte is maintained inside the cathode for rapid Li+ transport and high utilization of active materials. By addressing the dilemma between the shuttle chemistry and incomplete discharge of S/Se, the new electrolyte configuration demonstrates its feasibility to trigger higher capacity retention of the cathodes. As a result, Li-S and Li-Se cells with high energy and long cycle lives are realized, showing promise for practical use.
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Affiliation(s)
- Wen-Peng Wang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Juan Zhang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Ya-Xia Yin
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Hui Duan
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Jia Chou
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Sheng-Yi Li
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Min Yan
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Sen Xin
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Yu-Guo Guo
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
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Xia Y, Wang C, Li R, Fukuto M, Vogt BD. Sulfur Diffusion within Nitrogen-Doped Ordered Mesoporous Carbons Determined by in Situ X-ray Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8767-8776. [PMID: 29975064 DOI: 10.1021/acs.langmuir.8b01375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The low intrinsic conductivity of sulfur necessitates conductive additives, such as mesoporous carbons, to the cathode to enable high-performance metal-sulfur batteries. Simultaneous efforts to address polysulfide shuttling have introduced nitrogen-doped carbons to provide both conductivity and suppressed shuttling because of their strong interaction with sulfur. The strength of this interaction will impact the ability to fill the mesopores with sulfur via melt infusion. Here, we systematically investigate how nitrogen doping influences the rate that molten sulfur can infiltrate the mesopores and the overall extent of pore filling of highly ordered mesoporous doped carbons using in situ small angle X-ray scattering (SAXS). The similarity in electron density between molten sulfur and the soft carbon framework of the mesoporous material leads to a precipitous decrease in the scattered intensity associated with the ordered structure as voids are filled with sulfur. As the nitrogen doping increases from 1 to 20 at. %, the effective diffusivity of sulfur in the mesopores decreases by an order of magnitude (2.7 × 10-8 to 2.3 × 10-9 cm/s). The scattering becomes nearly invariant within 20 min of melt infiltration at 155 °C for all but the most doped carbon, which indicates that submicron-sized mesoporous carbon particles can be filled rapidly. Additionally, the nitrogen doping decreases the sulfur content that can be accommodated within the mesopores from 95% of the mesopores filled without doping to only 64% filled with 20 at. % N as determined by the residual scattering intensity. Sulfur does not crystallize within the mesopores of the nitrogen-doped carbons, which is further indicative of the strong interactions between the nitrogen species and sulfur that can inhibit polysulfide shuttling. In situ SAXS provides insights into the diffusion of sulfur in mesopores and how the surface chemistry of nitrogen-doped carbon appears to significantly hinder the infiltration by sulfur.
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Affiliation(s)
- Yanfeng Xia
- Department of Polymer Science, Goodyear Polymer Center , The University of Akron , 170 University Circle , Akron , Ohio 44325 , United States
| | - Chao Wang
- Department of Polymer Engineering , The University of Akron , 250 S Forge Street , Akron , Ohio 44325 , United States
| | - Ruipeng Li
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Masafumi Fukuto
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Bryan D Vogt
- Department of Polymer Engineering , The University of Akron , 250 S Forge Street , Akron , Ohio 44325 , United States
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5
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Song JY, Lee HH, Hong WG, Huh YS, Lee YS, Kim HJ, Jun YS. A Polysulfide-Infiltrated Carbon Cloth Cathode for High-Performance Flexible Lithium-Sulfur Batteries. NANOMATERIALS 2018; 8:nano8020090. [PMID: 29414863 PMCID: PMC5853722 DOI: 10.3390/nano8020090] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 01/26/2018] [Accepted: 01/29/2018] [Indexed: 11/16/2022]
Abstract
For practical application of lithium-sulfur batteries (LSBs), it is crucial to develop sulfur cathodes with high areal capacity and cycle stability in a simple and inexpensive manner. In this study, a carbon cloth infiltrated with a sulfur-containing electrolyte solution (CC-S) was utilized as an additive-free, flexible, high-sulfur-loading cathode. A freestanding carbon cloth performed double duty as a current collector and a sulfur-supporting/trapping material. The active material in the form of Li₂S₆ dissolved in a 1 M LiTFSI-DOL/DME solution was simply infiltrated into the carbon cloth (CC) during cell fabrication, and its optimal loading amount was found to be in a range between 2 and 10 mg/cm² via electrochemical characterization. It was found that the interwoven carbon microfibers retained structural integrity against volume expansion/contraction and that the embedded uniform micropores enabled a high loading and an efficient trapping of sulfur species during cycling. The LSB coin cell employing the CC-S electrode with an areal sulfur loading of 6 mg/cm² exhibited a high areal capacity of 4.3 and 3.2 mAh/cm² at C/10 for 145 cycles and C/3 for 200 cycles, respectively, with minor capacity loss (<0.03%/cycle). More importantly, such high performance could also be realized in flexible pouch cells with dimensions of 2 cm × 6 cm before and after 300 bending cycles. Simple and inexpensive preparation of sulfur cathodes using CC-S electrodes, therefore, has great potential for the manufacture of high-performance flexible LSBs.
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Affiliation(s)
- Ji-Yoon Song
- School of Chemical Engineering, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea.
| | - Hyeon-Haeng Lee
- School of Chemical Engineering, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea.
| | - Won Gi Hong
- Division of Electron Microscopy Research, Korea Basic Science Institute (KBSI), Daejeon 34133, Korea.
| | - Yun Suk Huh
- Department of Biological Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon 22212, Korea.
| | - Yun Sung Lee
- School of Chemical Engineering, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea.
| | - Hae Jin Kim
- Division of Electron Microscopy Research, Korea Basic Science Institute (KBSI), Daejeon 34133, Korea.
| | - Young-Si Jun
- School of Chemical Engineering, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea.
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6
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Yuan G, Pan J, Zhang Y, Yu J, He Y, Su Y, Zhou Q, Jin H, Xie S. Sepiolite/CNT/S@PANI composite with stable network structure for high performance lithium sulfur batteries. RSC Adv 2018; 8:17950-17957. [PMID: 35542059 PMCID: PMC9080492 DOI: 10.1039/c8ra01925h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 05/09/2018] [Indexed: 12/12/2022] Open
Abstract
Composite materials with a stable network structure consisting of natural sepiolite (Sep) powders, carbon nanotubes (CNTs) and conductive polymer (PANI) have been successfully synthesized using a simple vacuum heat treatment and chemical oxidation method, and they have been used as cathode materials for lithium sulfur batteries. It is found that Sep/CNT/S@PANI composites possess high initial discharge capacity, good cyclic stability and good rate performance. The initial discharge capacity of the Sep/CNT/S@PANI-II composite is about 1100 mA h g−1 at 2C, and remained at 650 mA h g−1 after 300 cycles, and the corresponding coulombic efficiency is above 93%. Such performance is attributed to specific porous structure, outstanding adsorption characteristics, and excellent ion exchange capability of sepiolite, as well as excellent conductivity of CNT. Furthermore, the PANI coating has a pinning effect for sulfur, which enhances the utilization of the active mass and improves the cycling stability and the coulombic efficiency of the composites at high current rates. The cathode composite materials for lithium sulfur batteries with a stable network structure consisting of natural sepiolite powders, carbon nanotubes and conductive polymer were synthesized by vacuum heat treatment and chemical oxidation method.![]()
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Affiliation(s)
- Guolong Yuan
- Hunan Provincial Key Laboratory of Thin Film Materials and Devices
- Xiangtan University
- Xiangtan
- China
| | - Junan Pan
- Hunan Provincial Key Laboratory of Thin Film Materials and Devices
- Xiangtan University
- Xiangtan
- China
| | - Yaguang Zhang
- Hunan Provincial Key Laboratory of Thin Film Materials and Devices
- Xiangtan University
- Xiangtan
- China
| | - Junxi Yu
- Hunan Provincial Key Laboratory of Thin Film Materials and Devices
- Xiangtan University
- Xiangtan
- China
| | - Yanjia He
- Hunan Provincial Key Laboratory of Thin Film Materials and Devices
- Xiangtan University
- Xiangtan
- China
| | - Yong Su
- Hunan Provincial Key Laboratory of Thin Film Materials and Devices
- Xiangtan University
- Xiangtan
- China
| | - Qi Zhou
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals
- Lanzhou University of Technology
- Lanzhou
- China
| | - Hongyun Jin
- Engineering Research Center of Nano-Geomaterials of Ministry of Education
- China University of Geosciences
- Wuhan
- China
| | - Shuhong Xie
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education
- School of Materials Science and Engineering
- Xiangtan University
- Xiangtan 411105
- China
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7
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Raccichini R, Dibden JW, Brew A, Owen JR, García-Aráez N. Ion Speciation and Transport Properties of LiTFSI in 1,3-Dioxolane Solutions: A Case Study for Li-S Battery Applications. J Phys Chem B 2017; 122:267-274. [PMID: 29227658 DOI: 10.1021/acs.jpcb.7b09614] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lithium-sulfur battery is considered to be one of the main candidates for "post-lithium-ion" battery generation because of its high theoretical specific capacity and inherently low cost. The role of electrolyte is particularly important in this system, and remarkable battery performances have been reported by tuning the amount of salt in the electrolyte. To further understand the reasons for such improvements, we chose the lithium bis(trifluoromethanesulfonyl)imide in 1,3-dioxolane electrolyte as a model salt-solvent system for a systematic study of conductivity and viscosity over a wide range of concentration from 10-5 up to 5 m. The experimental results, discussed and interpreted with reference to the theory of electrolyte conductance, lead to the conclusion that triple ion formation is responsible for the highest molal conductivity values before reaching the maximum at 1.25 m. At higher concentrations, the molal conductivity drops quickly because of a rapid increase in viscosity and the salt-solvent system can be treated as a diluted form of molten salt.
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Affiliation(s)
- Rinaldo Raccichini
- Department of Chemistry, University of Southampton , Southampton SO17 1BJ, U.K
| | - James W Dibden
- Department of Chemistry, University of Southampton , Southampton SO17 1BJ, U.K
| | - Ashley Brew
- E1 Culham Science Centre, OXIS Energy Ltd , Abingdon OX14 3DB, U.K
| | - John R Owen
- Department of Chemistry, University of Southampton , Southampton SO17 1BJ, U.K
| | - Nuria García-Aráez
- Department of Chemistry, University of Southampton , Southampton SO17 1BJ, U.K
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8
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Rehman S, Tang T, Ali Z, Huang X, Hou Y. Integrated Design of MnO 2 @Carbon Hollow Nanoboxes to Synergistically Encapsulate Polysulfides for Empowering Lithium Sulfur Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1700087. [PMID: 28371370 DOI: 10.1002/smll.201700087] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Revised: 02/14/2017] [Indexed: 06/07/2023]
Abstract
Lithium sulfur batteries (LSBs) with high theoretical energy density are being pursued as highly promising next-generation large-scale energy storage devices. However, its launch into practical application is still shackled by various challenges. A rational nanostructure of hollow carbon nanoboxes filled with birnessite-type manganese oxide nanosheets (MnO2 @HCB) as a new class of molecularly-designed physical and chemical trap for lithium polysulfides (Li2 Sx (x = 4-8)) is reported. The bifunctional, integrated, hybrid nanoboxes overcome the obstacles of low sulfur loading, poor conductivity, and redox shuttle of LSBs via effective physical confinement and chemical interaction. Benefiting from the synergistic encapsulation, the developed MnO2 @HCB/S hybrid nanoboxes with 67.9 wt% sulfur content deliver high specific capacity of 1042 mAh g-1 at the current density of 1 A g-1 with excellent Coulombic efficiency ≈100%, and retain improved reversible capacity during long term cycling at higher current densities. The developed strategy paves a new path for employing other metal oxides with unique architectures to boost the performance of LSBs.
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Affiliation(s)
- Sarish Rehman
- BIC-EAST, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Tianyu Tang
- BIC-EAST, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Zeeshan Ali
- BIC-EAST, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Xiaoxiao Huang
- BIC-EAST, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Yanglong Hou
- BIC-EAST, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
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Li S, Yang S, Shen D, Sun W, Shan X, Dong W, Chen Y, Zhang X, Mao Y, Tang S. Polysulfide intercalation in bilayer-structured graphitic C3N4: a first-principles study. Phys Chem Chem Phys 2017; 19:32708-32714. [DOI: 10.1039/c7cp05334g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A graphitic C3N4 bilayer can stabilize polysulfides (PSs) by using a micropore-scale interlayer as a promising anchoring material, and improve sulfur utilisation.
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Affiliation(s)
- Sinan Li
- College of Mining Engineering
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Shaobin Yang
- College of Materials Science and Engineering
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Ding Shen
- College of Mining Engineering
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Wen Sun
- College of Materials Science and Engineering
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Xueying Shan
- College of Materials Science and Engineering
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Wei Dong
- College of Materials Science and Engineering
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Yuehui Chen
- College of Science
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Xu Zhang
- College of Materials Science and Engineering
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Yongqiang Mao
- College of Science
- Liaoning Technical University
- Fuxin 123000
- P. R. China
| | - Shuwei Tang
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
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