阳极
石墨
离子
电子
电荷(物理)
导电体
溶剂
材料科学
化学物理
化学
物理
复合材料
电极
有机化学
物理化学
核物理学
量子力学
作者
Min Niu,Liwei Dong,Junpei Yue,Yaqiang Li,Y.B. Dong,Shichao Cheng,Sheng Lv,Y. S. Zhu,Zuotao Lei,Jun‐Hong Liang,Sen Xin,Chunhui Yang,Yu‐Guo Guo
标识
DOI:10.1002/anie.202318663
摘要
Graphite has been serving as the key anode material of rechargeable Li-ion batteries, yet is difficultly charged within a quarter hour while maintaining stable electrochemistry. In addition to a defective edge structure that prevents fast Li-ion entry, the high-rate performance of graphite could be hampered by co-intercalation and parasitic reduction of solvent molecules at anode/electrolyte interface. Conventional surface modification by pitch-derived carbon barely isolates the solvent and electrons, and usually lead to inadequate rate capability to meet practical fast-charge requirements. Here we show that, by applying a MoOx-MoNx layer onto graphite surface, the interface allows fast Li-ion diffusion yet blocks solvent access and electron leakage. By regulating interfacial mass and charge transfer, the modified graphite anode delivers a reversible capacity of 340.3 mAh g-1 after 4000 cycles at 6 C, showing promises in building 10-min-rechargeable batteries with a long operation life.
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