The search for ion‐conductive solid electrolytes for Li⁺ batteries is an important scientific and technological challenge with economic and sustainable energy implications. In this study, nanocrystals (NCs) of the ion conductor copper selenide (Cu_2−ySe) were doped with Li by the process of cation exchange. Li_2xCu_2−2xSe alloy NCs were formed at intermediate stages of the reaction, which was followed by phase segregation into Li₂Se and Cu₂Se domains. Li‐doped Cu_2−ySe NCs and Li₂Se NCs exhibit a possible SI phase at moderately elevated temperatures and warrant further ion‐conductance tests. These findings may guide the design of nanostructured super‐ionic electrolytes for Li⁺ transport.

中文翻译：

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硒化铜纳米晶体的锂化

寻求用于Li ⁺电池的离子导电固体电解质是一项重大的科学技术挑战，具有经济和可持续的能源影响。在这项研究中，离子导体硒化铜（Cu _2-y Se）的纳米晶体（NCs）通过阳离子交换过程掺杂了Li。Li _2x Cu _2-2x Se合金的NCs在反应的中间阶段形成，然后相分离成Li ₂ Se和Cu ₂ Se畴。锂掺杂的Cu _{2 -y} Se NCs和Li ₂硒NC在适度升高的温度下可能会出现SI相，并需要进行进一步的离子电导测试。这些发现可能指导Li ⁺传输的纳米结构超离子电解质的设计。