材料科学
多孔性
阳极
化学工程
锂(药物)
电化学
纳米技术
储能
蜂巢
电极
复合材料
化学
内分泌学
物理化学
工程类
医学
功率(物理)
物理
量子力学
作者
Junlu Zhu,Zhonggang Liu,Wei Wang,Liguo Yue,Wenwu Li,Haiyan Zhang,Ligong Zhao,Zheng He,Jianbo Wang,Yunyong Li
出处
期刊:ACS Nano
[American Chemical Society]
日期:2021-01-14
卷期号:15 (1): 1880-1892
被引量:39
标识
DOI:10.1021/acsnano.1c00048
摘要
Large-volume-expansion-induced material pulverization severely limits the electrochemical performance of high-capacity red phosphorus (RP) in alkali-ion batteries. Honeycomb-like porous materials can effectively solve the issues due to their abundant interconnected pore structures. Nevertheless, it is difficult and greatly challenging to fabricate a honeycomb-like porous RP that has not yet been fabricated via chemical synthesis. Herein, we successfully fabricate a honeycomb-like porous micron-sized red phosphorus (HPRP) with a controlled pore structure via a large-scale green and template-less hydrothermal strategy. It is demonstrated that dissolved oxygen in the solution can accelerate the destruction of P9 cages of RP, thus forming abundant active defects with a faster reaction rate, so the fast corrosion forms the honeycomb-like porous structure. Owing to the free volume, interconnected porous structure, and strong robustness, the optimized HPRP-36 can mitigate drastic volume variation and prevent pulverization during cycling resulting in tiny particle-level outward expansion, demonstrated by in situ TEM and ex situ SEM analysis. Thus, the HPRP-36 anode delivers a large reversible capacity (2587.4 mAh g–1 at 0.05 A g–1) and long-cycling stability with over 500 cycles (∼81.9% capacity retention at 0.5 A g–1) in lithium-ion batteries. This generally scalable, green strategy and deep insights provide a good entry point in designing honeycomb-like porous micron-sized materials for high-performance electrochemical energy storage and conversion.
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