期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 40, 页码 19479-19487出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta07096b
关键词
-
资金
- National Natural Science Foundation of China [51672075, 21271069, 51772092]
- Science and Technology Program of Hunan Province [2015JC3049]
Batteries with fast charging capability are urgently needed to meet the rapidly increasing demand for energy storage devices. For a lithium-ion battery (LIB), the anode materials hinder the realization of fast charging. Herein, we report a three-dimensional (3D) MnO nanoparticle (NP) N-doped lychee exocarp flaky carbon (MnO@NLEFC) based on biomass waste lychee exocarp for ultra-fast chargeable LIB anode materials. The rational design of using the redox reaction of lychee exocarp (cellulose, hemicellulose, lignin, etc.) and KMnO4 to generate a large number of MnOx nanoparticles on the surface of the lychee exocarp and then pyrolysis with the supplemented nitrogen source melamine can successfully realize the preparation of three-dimensional MnO@NLEFC. MnO nanoparticles inlaid in the carbon-based material not only improve the storage capacity of Li+, but also significantly increase the spacing of carbon layers and the disordered degree of carbon, which largely reduces the resistance for Li+ migration and thereby accelerates the rates of insertion and extraction of Li+. Due to these factors, MnO@NLEFC exhibits a high reversible capacity of 515.5 mA h g(-1) after 1000 cycles at 2 A g(-1) as the anode for a Li-ion battery. Even at an ultra-high current density of 20 A g(-1), it can still deliver a high reversible capacity of 309.2 mA h g(-1) after 1000 cycles with an efficiency over 95%, showing superior fast-charging capability.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据