Chemical prelithiation of Al for use as an ambient air compatible and polysulfide resistant anode for Li-ion/S batteries,Journal of Materials Chemistry A

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Chemical prelithiation of Al for use as an ambient air compatible and polysulfide resistant anode for Li-ion/S batteries
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-08-19 , DOI: 10.1039/d0ta06694j
Yongmin Huang _{1,

2,

3,

4,

5} , Chang Liu _{1,

2,

3,

4,

5} , Fengyuan Wei _{1,

2,

3,

4,

5} , Gongwei Wang _{1,

2,

3,

4,

5} , Li Xiao _{1,

2,

3,

4,

5} , Juntao Lu _{1,

2,

3,

4,

5} , Lin Zhuang _{1,

2,

3,

4,

5}

Affiliation

Lithium-ion/sulfur (Li-ion/S) batteries consisting of metallic lithium-free anodes and sulfur cathodes are promising energy storage solutions. Anode prelithiation enables a Li-ion/S battery assembly with the extensively-developed sulfur cathodes. However, it's very challenging owing to the low lithiation potentials of anode materials (e.g. Al, 0.32 V vs. Li/Li⁺). Here, a free-standing LiAl alloy anode (c-LiAl) is prepared via an easy-to-implement chemical prelithiation, by using a newly exploited reagent of lithium 9,9-dimethylfluorene (Li-DiMF) with a lower redox potential of 0.22 V vs. Li/Li⁺. Compared with the LiAl anode prepared by electrochemical prelithiation (e-LiAl) and the lithium metal anode by electrodeposition (e-Li/Cu), c-LiAl displays a superior cyclability in the half cell test and high resistance towards polysulfide or ambient-air corrosion. When paired with a sulfur cathode, the resulting Li-ion/S battery with c-LiAl demonstrates a much better cycling performance than the Li-ion/S battery with e-LiAl and the lithium/sulfur battery with e-Li/Cu.

中文翻译：

Al的化学预锂化，用作与锂离子/ S电池兼容的环境空气和耐多硫化物的阳极

由金属无锂阳极和硫阴极组成的锂离子/硫（Li-ion / S）电池是有前途的储能解决方案。阳极预锂化可实现锂离子/硫电池组件与广泛开发的硫阴极。但是，由于阳极材料的锂化电位低（例如， Al，0.32 V vs. Li / Li ⁺），这具有很大的挑战性。在这里，通过使用易于开发的化学预镀锂，使用一种新开发的氧化还原电位较低的9,9-二甲基芴锂（Li-DiMF）试剂，制备了独立的LiAl合金阳极（c-LiAl）。 0.22 V与李/李⁺。与通过电化学预锂化制备的LiAl阳极（e-LiAl）和通过电沉积制备的锂金属阳极（e-Li / Cu）相比，c-LiAl在半电池测试中显示出优异的循环性，并且对多硫化物或环境空气具有高耐受性腐蚀。当与硫阴极配对时，与c-LiAl制成的Li-ion / S电池相比，具有e-LiAl的Li-ion / S电池和具有e-Li / Cu的锂/硫电池具有更好的循环性能。

更新日期：2020-09-22

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