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Enhanced Anion-Derived Inorganic-Dominated Solid Electrolyte Interphases for High-Rate and Stable Sodium Storage 被引量:1
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作者 Jinhe Yu Weicheng Ren +3 位作者 Chang Yu Zhao Wang Yuanyang Xie Jieshan Qiu 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第4期179-186,共8页
It is highly desirable for the promising sodium storage possessing high rate and long stable capability,which are mainly hindered by the unstable yet conventional solvent-derived organic-rich solid electrolyte interph... It is highly desirable for the promising sodium storage possessing high rate and long stable capability,which are mainly hindered by the unstable yet conventional solvent-derived organic-rich solid electrolyte interphases.Herein,an electrolyte solvation chemistry is elaborately manipulated to produce an enhanced anion-derived and inorganic components-dominated solid electrolyte interphases by introducing a low permittivity(4.33)bis(2,2,2-trifluoroethyl)ether diluent into the sodium bis(trifluoromethylsulfonyl)imidedimethoxyethane-based high concentration electrolyte to obtain a localized high concentration electrolyte.The bis(2,2,2-trifluoroethyl)ether breaks the balance of original cation solvation structure and tends to interact with Na^(+)-coordinated dimethoxyethane solvent rather than Na^(+)in high concentration electrolyte,leaving an enhanced Coulombic interaction between Na^(+)and(FSO_(2))_(2)N^(-),and more(FSO_(2))_(2)N^(-)can enter the Na^(+)solvation shell,forming a further increased number of Na^(+)-(FSO_(2))_(2)N^(-)-dimethoxyethane clusters(from 82.0%for high concentration electrolyte to 94.3%for localized high concentration electrolyte)at a low salt dosage.The preferential reduction of this(FSO_(2))_(2)N^(-)-enriched clusters rather than the dimethoxyethane-dominated Na^(+)solvation structure produces an enhanced anion-derived and inorganic components-dominated solid electrolyte interphases.The reversible charge storage process of Na is decoupled by operando Raman along with a shift of D and G peaks.Benefiting from the enhanced anion-derived electrode-electrolyte interface,the commercial hard carbon anode in localized high concentration electrolyte shows a well rate capability(5 A g^(−1),70 mAh g^(−1)),cycle performance and stability(85%of initial capacity after 700 cycles)in comparison to that of high concentration electrolyte(68%)and low concentration electrolyte(only 5%after 400 cycles),indicative of uniqueness and superiorities towards stable Na storage. 展开更多
关键词 anion-derived inorganic-dominated SEI electrolyte solvation chemistry high rate and stability sodium storage
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Anion-derived solid electrolyte interphase realized in usualconcentration electrolyte for Li metal batteries 被引量:1
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作者 Zhimeng Hao Geng Li +3 位作者 Yong Lu Yichao Cai Gaojing Yang Jun Chen 《Nano Research》 SCIE EI CSCD 2023年第11期12647-12654,共8页
Constructing anion-derived solid electrolyte interphase(SEI)by recruiting anions into the solvation sheath of Li+is extremely conducive to restrain the dendrite growth of Li metal anode.However,the presence of anions ... Constructing anion-derived solid electrolyte interphase(SEI)by recruiting anions into the solvation sheath of Li+is extremely conducive to restrain the dendrite growth of Li metal anode.However,the presence of anions in the solvation sheath of Li+is severely hindered by the solvents with strong coordinating ability in conventional electrolyte.Herein,we boost the content of anions in the primary solvation sheath of Li+by employing a solvent with low donor number,2-methyltetrahydrofuran,inducing an anion-derived SEI.As a result,the Li||Cu cells show a high average Coulombic efficiency(>99%)over 500 cycles and the Li||LiFePO4 cells under a low negative/positive capacity ratio of 2:1 exhibit an impressive capacity retention of 90%after 100 cycles.This work provides insights on constructing stable anion-derived SEI and offers guidance in designing electrolytes for stable Li metal batteries. 展开更多
关键词 anion-derived solid electrolyte interphase donor number solvating power ELECTROLYTE lithium metal batteries
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Recent progress in electrolyte design for advanced lithium metal batteries 被引量:1
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作者 Mingnan Li Caoyu Wang +5 位作者 Kenneth Davey Jingxi Li Guanjie Li Shilin Zhang Jianfeng Mao Zaiping Guo 《SmartMat》 2023年第5期1-29,共29页
Lithium metal batteries(LMBs)have attracted considerable interest for use in electric vehicles and as next-generation energy storage devices because of their high energy density.However,a significant practical drawbac... Lithium metal batteries(LMBs)have attracted considerable interest for use in electric vehicles and as next-generation energy storage devices because of their high energy density.However,a significant practical drawback with LMBs is the instability of the Li metal/electrolyte interface,with concurrent parasitic reactions and dendrite growth,that leads to low Coulombic efficiency and poor cycle life.Owing to the significant role of electrolytes in batteries,rationally designed electrolytes can improve the electrochemical performance of LMBs and possibly achieve fast charge and a wide range of working temperatures to meet various requirements of the market in the future.Although there are some review papers about electrolytes for LMBs,the focus has been on a single parameter or single performance separately and,therefore,not sufficient for the design of electrolytes for advanced LMBs for a wide range of working environments.This review presents a systematic summary of recent progress made in terms of electrolytes,covering the fundamental understanding of the mechanism,scientific challenges,and strategies to address drawbacks of electrolytes for high-performance LMBs.The advantages and disadvantages of various electrolyte strategies are also analyzed,yielding suggestions for optimum properties of electrolytes for advanced LMBs applications.Finally,the most promising research directions for electrolytes are discussed briefly. 展开更多
关键词 anion-derived SEI fast charge liquid electrolyte design lithium metal batteries safe electrolytes wide working temperature
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