材料科学
阳极
锂(药物)
电化学
锌黄锡矿
电池(电)
异质结
插层(化学)
化学工程
纳米技术
电极
光电子学
无机化学
薄膜
物理化学
热力学
化学
捷克先令
功率(物理)
内分泌学
工程类
物理
医学
作者
Jingjing Jiang,Sanlue Hu,Xiangyong Zhang,Senlin Li,Hua Wang,Baohui Ren,Shizhen Li,Guangming Chen,Jinlong Yang,Cuiping Han,Zhuoxin Liu
标识
DOI:10.1002/adma.202311926
摘要
Abstract Traditional lithium‐ion battery (LIB) anodes, whether intercalation‐type like graphite or alloying‐type like silicon, which employ a single lithium storage mechanism, are often limited by modest capacity or substantial volume changes. Here, we introduce the kesterite multi‐metal dichalcogenide (CZTSSe) as an anode material that harnesses a conversion‐alloying hybrid lithium storage mechanism. Results unveil that during the charge‐discharge processes, the CZTSSe undergoes a comprehensive phase evolution, transitioning from kesterite structure to multiple dominant phases of sulfides, selenides, metals, and alloys. The involvement of multi‐components facilitates electron transport and mitigates swelling stress; meanwhile, it results in the formation of abundant defects and heterojunctions, allowing for increased lithium storage active sites and reduced lithium diffusion barrier. The CZTSSe delivers a high specific capacity of up to 2266 mA h g −1 at 0.1 A g −1 while maintaining a stable output of 116 mA h g −1 after 10000 cycles at 20 A g −1 . It also demonstrates remarkable low‐temperature performance, retaining 987 mA h g −1 even after 600 cycles at −40 °C. When employed in full cells, a high specific energy of 562 Wh kg −1 is achieved, rivalling many state‐of‐the‐art LIBs. This research offers valuable insights into the design of LIB electrodes leveraging multiple lithium storage mechanisms. This article is protected by copyright. All rights reserved
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