钼
材料科学
涂层
锂(药物)
电流密度
电极
电导率
化学工程
无机化学
纳米技术
化学
冶金
物理化学
医学
物理
量子力学
工程类
内分泌学
作者
Jiakai Du,Changjian He,Qingmeng Li,Jiali Chai,Qianqian Zhang,Bohejin Tang,Yichuan Rui
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:51 (16): 6390-6398
被引量:6
摘要
With a high specific capacity, MoP2 has been identified as an ideal electrode material for LIBs. However, the specific capacity is negatively affected due to its poor conductivity and severe volume expansion during insertion and extraction of Li+. In this paper, MoP2-C synthesized by using a Mo-MOF as a precursor, with the generation of C, can effectively solve the agglomeration problem in the synthesis process and alleviate serious volume changes during cycling. Due to the lack of carbon sources provided by a Mo-MOF, the conductivity of MoP2-C cannot be greatly improved. Therefore, rGO and PPy are added to improve the conductivity of MoP2 and further increase the stability of the structure. Compared with MoP2/C and MoP2/C@PPy, MoP2/C@rGO exhibits the highest initial discharge specific capacity of 1208 mA h g-1 at a current density of 100 mA g-1 and rate performances of 830, 750, 630, 550, and 430 mA h g-1 with the current density increasing from 100 mA g-1 to 2000 mA g-1. Notably, the specific capacity remains at 640 mA h g-1 at a current density of 100 mA g-1 after 100 cycles. Followed by 200 cycles at a current density of 2000 mA h g-1, the specific capacity remains at 395 mA h g-1 with a capacity retention rate of 80%.
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