阳极
材料科学
电化学
锂(药物)
电极
碳纤维
化学工程
热液循环
电流密度
纳米技术
复合材料
复合数
化学
物理化学
医学
物理
量子力学
工程类
内分泌学
作者
Shaofu Li,Caifeng Pan,Zhaohui Zhao,Wei Yang,Hanbo Zou,Shengzhou Chen
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:52 (43): 15822-15830
摘要
Reasonably combining the strengths of insertion and conversion anode materials to create an advanced anode material remains a formidable challenge for rechargeable lithium-ion batteries (LIBs). In this work, bulk MoS2 embedded with T-Nb2O5 nanospheres was synthesized via a simple hydrothermal process and a polydopamine carbon source was introduced by heat treatment. The design strategy can effectively accelerate the charge transfer and reduce the volume expansion during electrochemical cycling, leading to an improvement in lithium storage performance. As a consequence, the coexistence of T-Nb2O5, MoS2 and C can achieve the best synergistic effect when the molar ratio of Nb and Mo sources was 1 : 1. Notably, the T-Nb2O5@MoS2@C-1-1 electrode not only delivered an excellent reversible capacity of 518 mA h g-1 at a current density of 0.1 A g-1 but also exhibited superb cycling stability. The specific capacity of this electrode maintained 187 mA h g-1 at 2 A g-1 after 1000 cycles with a negligible capacity fading rate of only 0.015% per cycle.
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