阳极
锂(药物)
电解质
磷
离子
汽化
碳纤维
电化学
体积热力学
材料科学
阴极
电导率
化学
化学工程
纳米技术
电极
有机化学
物理化学
冶金
热力学
复合材料
工程类
内分泌学
复合数
医学
物理
作者
Yujie Huang,Hao Li,Mengjun Wu,Tian Tian,Yan Wang,Sixiu Zeng,Jiangping Song,Haolin Tang
标识
DOI:10.1016/j.jcis.2024.05.235
摘要
Red phosphorus (RP), the one of the most prospective anodes in lithium-ion batteries (LIBs), has been severely limited due to the intrinsic defects of massive volume expansion and low electronic conductivity. The vaporization-condensation-conversion (VCC), which confines RP nanoparticles into carbon host, is the most widely used method to address the above drawbacks and prepare RP/C nanostructured composites. However, the volume effect-dominated RP caused by the inevitably deposition of RP vapor on the surface of carbon material suffers from the massive volume change and unstable solid electrolyte interface (SEI) film. Herein, we propose a simple interfacial modification method to eliminate the superficial RP and yield stable surface composed of ion-conducting Li3PS4 solid electrolyte, endowing RP/AC composites excellent cycling performance and ultrafast reaction kinetics. Therefore, the RP/AC@S composites exhibit 926 mAh/g after 320 cycles at 0.2 A/g (running over 181 days), with 81.6 % capacity retention and a corresponding capacity decay rate of as low as 0.059 %. When coupled with LiFePO4 cathode, the full cells present superior cycling performance (62.1 mAh/g after 500 cycles at 1 A/g) and excellent rate capability (81.1 mAh/g at 1.0 A/g).
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