Enhancing the low-temperature performance in lithium ion batteries of Nb2O5 by combination of W doping and MXene addition

被引：33

作者：

Chen, Yao ^{[1
]}

Pu, Ziyan ^{[1
]}

Liu, Yuebin ^{[1
]}

Shen, Yuxi ^{[1
]}

Liu, Shimin ^{[1
]}

Liu, Di ^{[1
]}

Li, Yueming ^{[1
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Coll Mat Sci & Engn, Qinhuangdao 066004, Hebei, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2021年 / 515卷

基金：

中国国家自然科学基金;

关键词：

Li-ion batteries; Nb2O5; MXene; Cycling stability; Safety; Doping; Low operation temperature; ENERGY-STORAGE; INTERCALATION; HYBRID; ANODE; NANOCOMPOSITES; ARCHITECTURES; NANOFIBERS; COMPOSITE; STATE;

D O I：

10.1016/j.jpowsour.2021.230601

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The negative electrode working safely at low temperature can guarantee the safe use of lithium ion battery in cold climate. However, currently used graphite negative electrode suffers the potential danger of lithium dendrite growth especially at low temperature. Herein, a series of W-doped Nb2O5/MXene composites are designed to boost the electrochemical performance of Nb2O5 at low temperature. As negative electrode in lithium ion batteries, the designed nanocomposites displayed boosted electrochemical performance at -10 and -20 degrees C. At 20 degrees C, the Nb2O5/MXene with 3% W doping displays high reversible capacity (160.7 mAh g(-1) at 0.1 A g(-1)), excellent rate capability (108.6 mAh g(-1) at 1 A g(-1)) and good cycling performance (similar to 96.3% within 500 cycles), showing significant boost in electrochemical performance. The combination of MXene addition and W doping play a vital role in boosting the electrochemical performance of Nb2O5 at low operation temperature. In consideration of the inherent safety, improved cycling stability, and enhanced rate capability at low operation temperature, the as-designed Nb2O5/MXene can be promising negative electrode for lithium ion batteries to overcome the safety issue at low temperature.

引用

页数：10

共 56 条

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