阳极
材料科学
介电谱
锂(药物)
碳纤维
电导率
涂层
电化学
化学工程
气泡
电极
纳米技术
原子层沉积
图层(电子)
复合材料
化学
复合数
内分泌学
工程类
物理化学
并行计算
医学
计算机科学
作者
Donghai Wei,Yinglong Wu,Yan Nie,Junfei Duan,Chenhao Cao,Jianghong Wu,Lingjun Li,Zhaoyong Chen,Hang Zhang,Huigao Duan
标识
DOI:10.1016/j.apsusc.2020.147114
摘要
Red phosphorus (RP), as one of the most promising anode materials for lithium-ion batteries, attracts much attention for its high theoretical specific capacity, cost-effective, and commercial availability. However, poor cycling stability and rate capability caused by huge volume expansion and low intrinsic electronic conductivity hinder the commercialization of RP-based anode. Herein, RP confined in ultrathin hollow carbon-bubble-constructed foam (RP-HC) is developed to improve electronic conductivity and mechanical structure stability. Additionally, low-temperature atomic layer deposition (LT-ALD) technology is adopted to further modify the surface of the RP-HC, forming a core–shell [email protected]2 structure with about 5 nm TiO2 coating layer. Benefiting from the dual confinement of TiO2 buffer layer and conductive porous carbon host with effective POC bond, the RP-HC(70%)@TiO2 electrode delivers an outstanding cycling performance (795.2 mAh g−1 after 200 cycles at 100 mA g−1) and rate capability (459.9 mAh g−1 at 2000 mA g−1, almost 1.6 times and 12 times relative to RP-HC(70%) and RP under the same test condition). In-situ electrochemical impedance spectroscopy analyses are also conducted to investigate the superior Li+ storage properties of the [email protected]2.
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