电解质
阳极
相间
阴极
材料科学
硅
电极
化学工程
纳米技术
法拉第效率
化学
光电子学
遗传学
生物
工程类
物理化学
作者
Shuo Yang,Yuping Zhang,Zhongliang Li,Norio Takenaka,Yan Liu,Hanqin Zou,Wenting Chen,Mingcong Du,Xu‐Jia Hong,Rui Shang,Eiichi Nakamura,Yue‐Peng Cai,Ya‐Qian Lan,Qifeng Zheng,Yuki Yamada,Atsuo Yamada
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2021-04-15
卷期号:6 (5): 1811-1820
被引量:38
标识
DOI:10.1021/acsenergylett.1c00514
摘要
Silicon-based materials have been regarded as the most promising anodes for high-energy batteries, when combined with high- voltage/capacity nickel-rich layered cathodes. However, challenges arise from unstable electrode/electrolyte interphases on the anode and cathode as well as from safety hazards associated with highly flammable commercial electrolytes. Herein, we rationally design a nonflammable cyclic phosphate-based electrolyte to tune the electrode/electrolyte interphase components by controlling the reduction of a cyclic phosphate and Li salt. This strategy enables the electrolyte to form a highly elastic, robust inorganic–polymeric interphase on microsized silicon-based anodes that can accommodate the immense volume changes. Furthermore, by generating a stable polymeric interphase on the surface of the cathode as well, a SiO|LiNi0.6Mn0.2Co0.2O2 cell demonstrated an extremely high energy density of ∼590 Wh·kg–1 with 71.4% capacity retained over 300 cycles and high Coulombic efficiency of 99.9%. This interfacial regulation strategy is of vital importance for designing new electrolytes for high-energy-density batteries.
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