Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10154701 | Journal of Power Sources | 2018 | 8 Pages |
Abstract
The electrification of transportation necessitates the growth of high-power-density lithium ion batteries. However, traditional graphite anodes in lithium ion batteries perform poorly especially when charged or discharged under high current density. In this work, we deposit nanoflake δ-MnO2 on the carbon nanotubes-Graphene-Nickel foam compound matrix and apply it as a self-standing anode without binder or conductive agent. This composite buffers volume change, enables more electrochemical active sites, boosts the conductivity of electrode materials and facilitates lithium-ion diffusion. The resulting lithium ion batteries with the composite anodes show improved cycle life and enhanced rate performance, yielding a high specific capacity of 1250 mAh gâ1 for 350 cycles at 0.4â¯Aâ¯gâ1 and 490 mAh gâ1 over 700 cycles at 4.0â¯Aâ¯gâ1.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Xue Zhai, Zhu Mao, Guangyu Zhao, David Rooney, Naiqing Zhang, Kening Sun,