材料科学
锂(药物)
润湿
阳极
扩散
复合数
阴极
化学工程
离子电导率
表面张力
导线
离子
复合材料
电解质
电极
热力学
物理化学
化学
内分泌学
工程类
物理
有机化学
医学
作者
Zongyang Li,Weikang Zheng,Guanjie Lu,Menghong Li,Desha Tang,Qiannan Zhao,Yumei Wang,Chaohe Xu,Ronghua Wang
标识
DOI:10.1002/adfm.202309751
摘要
Abstract The urgent demand for high energy and safety batteries has generated the rapid development of Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) type solid‐state lithium metal batteries. However, severe dendritic lithium growth, which is caused by poor interfacial contact of the Li/LLZTO interface and loss of electrical contact during cycles due to low intrinsic Li + diffusion coefficient of lithium, greatly hampers its practical application. Here, from the point of view of reducing surface tension and improving ion diffusion of lithium, a composite lithium anode (CLA) with high wettability and ion diffusion coefficient is prepared by adding GaP into molten lithium, thus strengthening the CLA/LLZTO interface even in cycling. As envisioned, compared to pure lithium, CLA presents lower surface tension, larger adhesion work, and higher ion diffusion coefficient, ensuring close contact of the CLA/LLZTO interface. Therefore, the assembled symmetric cells exhibit a low area specific resistance of 4.5 Ω cm 2 , a large critical current density of 2.5 mA cm −2 , and ultra‐long lifespan of 5700 h at 0.3 mA cm −2 at 25 °C. Meanwhile, full cells coupled with LiFePO 4 cathode show a high‐capacity retention of 97.32% after 490 cycles at 1C. This work provides a new solution to the interfacial challenges of solid‐state lithium‐metal batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI