电化学2020，Vol.26Issue(5)：740-749,10.DOI:10.13208/j.electrochem.200646
类石墨烯类活性炭材料的简易合成及其在锂硫电池中的应用研究
Facile Synthesis of Nitrogen-Doped Graphene-Like Active Carbon Materials for High Performance Lithium-Sulfur Battery
摘要
Abstract
Lithium-sulphur(Li-S)battery is regarded as a promising energy storage device because of its high theoretical capac-ity.However,the low S utilization and short cycling life limit the commercial applications.In this work,nitrogen-doped graphene-like carbon(NGC)materials were synthesized by simply pyrolyzing and carbonizing the mixture of melamine(C3HsN6)and L-cysteine(C3H7NO2S).The graphene-like structure in NGC effectively buffered the volume change of S during the dis-charge/charge process and improved the cycling stability.Meanwhile,nitrogen-containing functional groups in NGC facilitated the transportation of ions and suppressed the dissolution of polysulphide(PS),enabling a high utilization of S.As expected,the NGC-8(the mass ratio of melamine and L-cysteine being 8:1)/PS cathode delivered a high initial discharge capacity of 1164.1 mAh·g-1 at 0.2 C and still retained 909.4 mAh·g-1 capacity after 400 cycles with a slow capacity decay rate of 0.05％ per cycle.Even at as high as 2 C,a high-rate capacity of820 mAh·g-1 could be achieved.关键词
锂硫电池/类石墨烯碳材料/体积效应/循环稳定性Key words
lithium-sulphur battery/graphene-like carbon/volume change/cycling stability分类
化学化工引用本文复制引用
孟全华,邓雯雯,李长明..类石墨烯类活性炭材料的简易合成及其在锂硫电池中的应用研究[J].电化学,2020,26(5):740-749,10.基金项目
This work was supported by the National Natural Science Foundation of China(No.21905194),the Natural Science Foundation of Jiangsu Province(No.SBK2018042005),the Natural Science Foun-dation of the Jiangsu Higher Education Institution of China(Grant No.18KJB150029). （No.21905194）
