新型炭材料2017，Vol.32Issue(4)：297-303,7.
富氮中空炭微球的制备及其用作锂硫电池的电化学性能
N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries
摘要
Abstract
SiO2@C nanospheres were fabricated by polymerization of dopamine in the presence of tetraethyl orthosilicate followed by carbonization and the SiO2 was chemically etched away to obtain hollow N-doped carbon nanospheres ( N-CNs) to host sulfur. The resulting material ( S@N-CNs) was used as the cathode material of a Li-S battery. Results indicate that the S@N-CNs can ef-fectively suppress the volume expansion of sulfur and the shuttle effect of polysulfides during charge and discharge. Nitrogen doping improves the electrical conductivity of the N-CNs. The initial reversible capacity of the S@ N-CN electrode at 0. 2 C is 1179 mAh·g-1 , which remains at 540 mAh·g-1 after 100 cycles. The electrode has excellent rate capability (343 mAh·g-1 at 1 C and 247 mAh·g-1 at 2 C) .关键词
中空炭微球/氮掺杂/锂硫电池Key words
Hollow carbon sphere/Nitrogen doping/Lithium-sulfur battery分类
化学化工引用本文复制引用
张永正,丁立新,詹亮,王艳莉,宋燕..富氮中空炭微球的制备及其用作锂硫电池的电化学性能[J].新型炭材料,2017,32(4):297-303,7.基金项目
国家自然科学基金(51472086,51002051) （51472086,51002051）
上海市自然科学基金(12ZR1407200) （12ZR1407200）
中国科学院炭材料重点实验室开放课题资助项目(KLCMKFJJ1703).Foundation item:National Natural Science Foundation of China (51472086, 51002051) （KLCMKFJJ1703）
Natural Science Foundation of Shanghai City (12ZR1407200) （12ZR1407200）
CAS Key Laboratory of Carbon Materials (KLCMKFJJ1703). （KLCMKFJJ1703）
