磷化物
硫黄
材料科学
纳米颗粒
阴极
锂(药物)
化学工程
扩散
碳纤维
金属
催化作用
吸附
相(物质)
纳米技术
化学
冶金
复合材料
有机化学
物理化学
复合数
内分泌学
工程类
物理
热力学
医学
作者
Junhui Luo,Yang Wang,Yujie Mao,Yu Zhang,Yun Su,Binchun Zou,Shixia Chen,Qiang Deng,Zheling Zeng,Jun Wang,Shuguang Deng
标识
DOI:10.1016/j.cej.2021.133549
摘要
Tailoring well-dispersed nanoparticles on the sulfur host with high catalytic activity is of great importance yet remains challenging in lithium-sulfur batteries (LSBs). Herein, a novel multi-phase interface structure of embedded CoP and Co2P nanoparticles (CoxP NPs) on hollow N-doped carbon substance (CoxP/NC) was successfully fabricated by the in-situ conversion of [email protected] dual templates. The abundant multi-phase interfaces on CoxP/NC enabled efficient lithium polysulfides (LiPSs) capture, accelerated Li-ion diffusion, and boosted LiPSs conversion, thus forming a rapid and robust “adsorption-diffusion-conversion” network. Moreover, the well-defined hollow carbon polyhedrons physically inhibit the LiPSs diffusion and provide superior conductivity. As a result, the assembled [email protected]xP/NC cathode with a high sulfur loading of 82% delivers an excellent rate capability (617.7 mAh g−1 at 3C), impressive stability (a small capacity decay of 0.053% per cycle over 1250 cycles at 1C), and favorable durability of thick sulfur cathodes (with a high areal sulfur loading of 4.68 mg cm2 over 300 cycles).
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