N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries

ZHANG Yong-zheng; DING Li-xin; ZHAN Liang; WANG Yan-li; SONG Yan

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Article Navigation > New Carbon Mater. > 2017 > 32(4): 297-303

ZHANG Yong-zheng, DING Li-xin, ZHAN Liang, WANG Yan-li, SONG Yan. N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries. New Carbon Mater., 2017, 32(4): 297-303.

Citation:

ZHANG Yong-zheng, DING Li-xin, ZHAN Liang, WANG Yan-li, SONG Yan. N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries. New Carbon Mater., 2017, 32(4): 297-303.

ZHANG Yong-zheng, DING Li-xin, ZHAN Liang, WANG Yan-li, SONG Yan. N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries. New Carbon Mater., 2017, 32(4): 297-303.

Citation:

ZHANG Yong-zheng, DING Li-xin, ZHAN Liang, WANG Yan-li, SONG Yan. N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries. New Carbon Mater., 2017, 32(4): 297-303.

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N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries

1.
State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2.
CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Funds: National Natural Science Foundation of China (51472086,51002051);Natural Science Foundation of Shanghai City (12ZR1407200);CAS Key Laboratory of Carbon Materials (KLCMKFJJ1703).

Received Date: 2017-05-28
Accepted Date: 2017-08-31
Rev Recd Date: 2017-08-01
Publish Date: 2017-08-28

Abstract

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 effectively 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 1 179 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).
- Hollow carbon sphere,
- Nitrogen doping,
- Lithium-sulfur battery

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