Abstract
To get rid of impurities on a Li surface and avoid hydrogen gas generation during the preparation of a lithium pyrrolide film,tetrahydrofuran(THF) was used to pretreat the surface of a Li electrode.We found that THF pretreatment can obviously refresh the Li surface as well as improve the uniformity and density of the lithium pyrrolide film.The interface resistance effectively decreases and the interfacial stability improves.Additionally,the reversibility of the lithium deposition/dissolution process increases.All the 'sponge-shaped' lithium deposits are homogeneously distributed on the electrode surface and the lithium cycling efficiency is enhanced by THF pretreatment.
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