State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150001 , China.
Academy of Fundamental and Interdisciplinary Sciences , Harbin Institute of Technology , Harbin 150001 , China.
ACS Appl Mater Interfaces. 2018 Apr 11;10(14):11708-11714. doi: 10.1021/acsami.8b00632. Epub 2018 Apr 2.
To satisfy the demand of high power application, lithium-ion batteries (LIBs) with high power density have gained extensive research effort. The pseudocapacitive storage of LIBs is considered to offer high power density through fast faradic surface redox reactions rather than the slow diffusion-controlled intercalation process. In this work, CuCoS anchored on N/S-doped graphene is in situ synthesized and a typical pseudocapacitive storage behavior is demonstrated when applied in the LIB anode. The pseudocapacitive storage and N/S-doped graphene enable the composite to display a capacity of 453 mA h g after 500 cycles at 2 A g and a ultrahigh rate capability of 328 mA h g at 20 A g. We believe that this work could further promote the research on pseudocapacitive storage in transition-metal sulfides for LIBs.
为了满足高功率应用的需求，具有高功率密度的锂离子电池（LIB）得到了广泛的研究。LIB 的赝电容存储被认为通过快速的法拉第表面氧化还原反应而不是缓慢的扩散控制嵌入过程来提供高功率密度。在这项工作中，CuCoS 锚定在 N/S 掺杂的石墨烯上原位合成，并在 LIB 阳极中应用时表现出典型的赝电容存储行为。赝电容存储和 N/S 掺杂的石墨烯使复合材料在 2 A g 下循环 500 次后具有 453 mA h g 的容量，在 20 A g 下具有超高的倍率性能 328 mA h g。我们相信这项工作可以进一步推动用于 LIB 的过渡金属硫化物赝电容存储的研究。
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