Nitrogen-Doped Porous Hard Carbon as an Anode for Fast-Charging Lithium-Ion Batteries

被引：0

作者：

Li S. ^{[1
]}

Ye C. ^{[1
]}

Wang Y. ^{[1
]}

Zhu Y. ^{[1
,2
]}

机构：

[1] School of Chemistry and Materials Science, University of Science and Technology of China, Hefei

[2] Hefei National Research Center for Physical Sciences at the Microscale, Hefei

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2023年 / 51卷 / 09期

关键词：

fast-charging; hard carbon; high capacity; lithium-ion battery; ultra-micropores;

D O I：

10.14062/j.issn.0454-5648.20230094

中图分类号：

学科分类号：

摘要：

The limited capacity and long charging time of graphite-based anodes for lithium-ion batteries cannot meet ever-growing demands. Developing anodes with a high capacity and a fast charging ability becomes a hotspot of the present research. Herein, an N-doped porous hard carbon (N-HC) was prepared via dehydration reaction of sucrose and sulfuric acid and subsequent annealing in NH3/Ar. The diffusion coefficient of Li+ in N-HC reaches 9.0×10−8 cm2·s−1 due to the rich ultra-micropore structure (i.e., pore size < 0.75 nm) and the large interlayer spacing (i.e., 0.39 nm) in N-HC. The capacity of N-HC remains 704.0 mA·h·g–1 or 269.2 mA·h·g–1 after 680 or 1 400 cycles at 0.27 C or 2.7 C (1 C=370 mA·g−1). The N-HC electrode can meet the requirement of fast charging lithium-ion battery, while the initial Coulomb efficiency needs to be improved. © 2023 Chinese Ceramic Society. All rights reserved.

引用

页码：2188 / 2196

页数：8

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