Strategies for fabrication, confinement and performance boost of Li2S in lithium-sulfur, silicon-sulfur & related batteries

Strategies for fabrication, confinement and performance boost of Li2S in lithium-sulfur, silicon-sulfur & related batteries
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锂硫、硅硫中 Li2S 的制造、限制和性能提升策略

DOI:
10.1016/j.mattod.2021.03.017
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发表时间:
2021-04
期刊:
影响因子:
24.2
通讯作者:
Gleb Yushin
Gleb Yushin
中科院分区:
材料科学1区
文献类型:
--
作者:
Shunrui Luo;Feixiang Wu;Gleb Yushin

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基于元素硫阴极的锂-硫(Li-S)电池需要在电池构造中使用高反应性金属Li或Li合金阳极。为了与更安全的无锂阳极相匹配,硫化锂(Li 2S)已被研究作为轻质锂和锂离子电池的有前途的替代阴极材料。然而,固有的高电阻、大的第一电荷势垒、循环期间的溶解和多硫化物穿梭限制了Li 2S的电化学性能。在这篇综述中,我们讨论了生产基于Li 2S的纳米和微米级复合颗粒和独立电极的各种方法,旨在克服这些挑战。此外,我们还讨论了电解质优化的策略。最后,我们分享了我们对最先进的研究示范和成功的大众市场商业化的要求之间的差距的看法。
Lithium-sulfur (Li-S) batteries based on elemental sulfur cathodes require the use of highly reactive metallic Li or Li alloy anodes in cell constructions. In order to match with safer Li-free anodes, lithium sulfide (Li2S) has been studied as a promising alternative cathode material for lightweight Li and Li-ion batteries. However, intrinsically high electrical resistance, large first charge barrier, dissolution during cycling and polysulfide shuttle limit the electrochemical performance of Li2S. In this review, we discuss various approaches for producing Li2S-based nano- and micron-scale composite particles and standalone electrodes aiming to overcoming such challenges. In addition, we discuss strategies for electrolyte optimizations. Finally, we share our perspective on the gaps between the state-of-the art research demonstrations and the requirements for successful mass-market commercialization.
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