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| 1 | Electrolyte Engineering for High-Voltage Lithium Metal Batteries显示文摘High-voltage lithium metal batteries(HVLMBs)have been arguably regarded as the most prospective solution to ultrahigh-density energy storage devices beyond the reach of current technologies.Electrolyte,the only component inside the HVLMBs in contact with both aggressive cathode and Li anode,is expected to maintain stable electrode/electrolyte interfaces(EEIs)and facilitate reversible Li+transference.Unfortunately,traditional electrolytes with narrow electrochemical windows fail to compromise the catalysis of high-voltage cathodes and infamous reactivity of the Li metal anode,which serves as a major contributor to detrimental electrochemical performance fading and thus impedes their practical applications.Developing stable electrolytes is vital for the further development of HVLMBs.However,optimization principles,design strategies,and future perspectives for the electrolytes of the HVLMBs have not been summarized in detail.This review first gives a systematical overview of recent progress in the improvement of traditional electrolytes and the design of novel electrolytes for the HVLMBs.Different strategies of conventional electrolyte modification,including high concentration electrolytes and CEI and SEI formation with additives,are covered.Novel electrolytes including fluorinated,ionic-liquid,sulfone,nitrile,and solid-state electrolytes are also outlined.In addition,theoretical studies and advanced characterization methods based on the electrolytes of the HVLMBs are probed to study the internal mechanism for ultrahigh stability at an extreme potential.It also foresees future research directions and perspectives for further development of electrolytes in the HVLMBs. | LiweiDong Shijie Zhong Botao Yuan Yuanpeng Ji Jipeng Liu Yuanpeng Liu Chunhui Yang Jiecai Han Weidong He | 2022 | Research2022，，4： | 0 |
| 2 | 溶剂化能调控实现低浓度锂电池电解液显示文摘锂离子的溶剂化结构对电极/电解液的界面性能有决定性的作用,进而影响电池性能.降低盐浓度可能导致固态电解质界面(SEI)膜中有机组分含量增加、进而影响循环稳定性,这使得发展低浓度电解液(LCEs)非常具有挑战性.低溶剂化能溶剂与盐之间的弱相互作用给LCEs带来了新的机会.本文采用氟代碳酸乙烯酯(FEC)和1,1,2,2-四氟乙基-2,2,3,3-四氟丙基醚(D_(2))制备了盐浓度仅为0.25mol L^(-1)的LCE.分子动力学模拟和实验证明,溶剂化能较低的FEC不仅降低了Li^(+)的去溶剂化能、改善了电池动力学,而且促进了富含LiF的SEI的形成、抑制了电解液的消耗.使用LCE的Li||Cu电池库仑效率高达99.20%,LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)||Li电池在200个循环中也表现出89.93%的容量保留率,这表明溶剂化能调控在LCEs发展中有巨大潜力. | 彭琳珊 巫湘坤 贾梦敏 钱伟伟 张晓妍 周娜 张兰 菅翠营 张锁江 | 2022 | Science Bulletin2022，67，21： | 0 |
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