Multifunctional Separator with Porous Carbon/Multi‐Walled Carbon Nanotube Coating for Advanced Lithium−Sulfur Batteries

ChemElectroChem - Tập 5 Số 1 - Trang 71-77 - 2018
Lei Tan1, Xinhai Li1, Zhixing Wang1, Huajun Guo1, Jiexi Wang1, Liang An2
1School of Metallurgy and Environment, Central South University, Changsha, 410083, China
2Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China

Tóm tắt

AbstractAn issue associated with lithium−sulfur (Li−S) batteries is polysulfide dissolution, leading to the serious crossover of polysulfide to the Li anode. To address this issue, we report on a multifunctional separator prepared by introducing a porous carbon/multi‐walled carbon nanotube (PC/MWCNT) composite into a commercial separator. It shows that the PC/MWCNT composite is able to enhance the interfacial interaction between the coating and the polysulfide and provides a large surface area for absorbing the polysulfide, thus improving the electrical conductivity. It has been demonstrated that the Li−S cell constructed with the PC/MWCNT composite separator results in a reversible capacity as high as 659 mAh g−1 after 200 cycles at 0.5 C, and the average capacity fading rate of the cell is about 0.138 % per cycle. The performance improvement is attributed to a reduction in the crossover rate of polysulfide through the composite separator as a result of the polysulfide absorption by PC/MWCNT layer.

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Tài liệu tham khảo

10.1177/1420326X13504423

10.1177/1420326X15581718

10.1038/nmat2460

10.1039/c2nr33044j

10.1039/c2cs35256g

10.1016/j.ceramint.2015.08.104

10.1016/j.electacta.2015.11.093

10.1016/j.jpowsour.2013.11.095

10.1016/j.jpowsour.2012.12.102

10.1021/jz401763d

Liu X., 2017, Adv. Mater., 1601759

10.1002/anie.201304762

10.1016/j.electacta.2012.03.081

10.1039/C3EE42223B

10.1002/celc.201500342

10.1021/jp304380j

10.1002/adma.201404194

10.1016/j.electacta.2011.03.005

10.1038/nmat2460

10.1016/S2095-4956(14)60152-2

10.1002/adma.201602914

10.1021/ja206955k

10.1021/nl5020475

10.1007/s12274-016-1005-1

Xiao P., 2017, Adv. Mater., 1703324

Zhang Z., 2017, Adv. Energy Mater., 1602543

10.1039/C3TA14161F

10.1021/nl2027684

10.1021/nl502238b

10.1021/acsami.5b11327

10.1016/j.nanoen.2017.01.040

10.1002/admi.201500048

10.1021/acs.nanolett.5b04166

10.1039/c2cc33945e

10.1016/j.ensm.2015.09.008

10.1039/C6TA02272C

10.1002/adfm.201400845

10.1021/jz5006913

10.1016/j.ensm.2016.12.004

10.1002/advs.201500268

10.1021/acs.nanolett.6b04610

10.1002/adma.201603401

10.1021/acsami.6b07487

10.1021/acsami.7b00065

Kong W., 2017, Adv. Funct. Mater., 1606663

10.1016/j.electacta.2014.02.077

10.1016/j.jallcom.2015.10.217

10.1016/j.jpowsour.2015.09.067

10.1039/C4EE01377H

10.1002/adma.201605160

10.1002/anie.201608730

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ChemElectroChem

Tập 5 Số 1

71-77

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