首页|Polyaniline spaced MoS2 nanosheets with increased interlayer distances for constructing high-rate dual-ion batteries

Polyaniline spaced MoS2 nanosheets with increased interlayer distances for constructing high-rate dual-ion batteries

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Dual-ion batteries(DIBs)have attracted great attention due to their affordable prices,environmental friendliness,and high operating voltage.However,the conventional graphite anode in DIBs has draw-backs such as unsatisfactory capacity and worrying safety.MoS2 is considered to be a competitive anode material that exhibits large capacity due to its unique layered structure for cation insertion/extraction.Nevertheless,the sluggish reaction kinetics of MoS2 does not match the cathode side,which makes the constructed full DIBs show poor rate ability.Here,a flower-like MoS2/polyaniline composite electrode(MoS2-PANI)where PANI was grown in situ between layers of MoS2 nanosheets was designed.In this design,the inserted PANI can broaden the layer distance of MoS2 to facilitate cation diffusion and pre-vent the restacking of nanosheets.Furthermore,PANI is also expected to increase the conductivity and relieve the volume changes during repeated charge/discharge cycles.Benefiting from that,the MoS2-PANI electrode delivered a reversible capacity of 561.91 mA h g-1 at 5 A g-1 in half-cell test.Moreover,when coupled with a mildly expanded graphite(MEG)cathode,the obtained MEG//MoS2-PANI DIB shows ex-cellent rate ability with.a reversible discharge capacity of 86.62 mA h g-1 and a desirable energy density of 308.83 W h kg-1 at 20 C.These results provide some inspiration for the design of high-rate DIBs.

Dual-ion BatteryAnode materialsMoS2High rate performance

Xuhui Liu、Xingdong Ma、Guoshun Liu、Xiaobin Zhang、Xiaoqi Tang、Chao Li、Xiaobei Zang、Ning Cao、Qingguo Shao

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School of Materials Science and Engineering,State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,China

山东省自然科学基金国家自然科学基金State Key Laboratory of Heavy Oil ProcessingNational Defense Science and Technology Innovation Special Zone Project

ZR2020QE04821905304SKLHOP20210100622-05-CXZX-04-04-29

2024

10.1016/j.jmst.2023.11.001

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.182(15)
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