Ultrastable Anode/Electrolyte Interface in Solid-State Lithium-Metal Batteries Using LiCux Nanowire Network Host
Ultrastable Anode/Electrolyte Interface in Solid-State Lithium-Metal Batteries Using LiCux Nanowire Network Host
复制标题
使用 LiCux 纳米线网络主机的固态锂金属电池中的超稳定阳极/电解质界面
DOI：
10.1021/acsami.1c11613
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发表时间：
2021
影响因子：
9.5
通讯作者：
Huang Jianyu
中科院分区：
文献类型：
--
作者：
Dai Qiushi;Zhao Jun;Ye Hongjun;Chen Jingzhao;Su Yong;Yang Tingting;Liu Qiunan;Sun Haiming;Li Hui;Yao Jingming;Gao Zhiying;Fu Xingjie;Zhu Dingding;Yan Jitong;Li Mingyu;Qiu Hailong;Huang Qiao;Zhang Liqiang;Tang Yongfu;Guo Xiangxin;Huang Jianyu
高界面电阻和不可控制的锂（Li）枝晶是固态锂金属电池（SSLMB）中的主要挑战，因为它们导致SSLMB的过早短路和故障。在这里，我们报道了一种复合阳极的合成，该复合阳极包括用Li渗透的三维LiCux纳米线网络主体（Li* 阳极），具有低界面阻抗和上级电化学性能。Li* 阳极通过将Cu箱溶解到熔融Li中然后固化来制造。Li* 阳极表现出与Li6.4La3Zr1.4Ta0.6O12（LLZTO）的良好润湿性和高机械强度，从而产生低Li*/LLZTO界面阻抗、Li的均匀沉积和Li枝晶的抑制。因此，具有LiNi0.88Co0.1Al0.02O2（NCA）、LiFePO 4（LFP）和FeF 2阴极的基于Li* 阳极的对称电池和全电池提供了卓越的电化学性能。具体而言，Li*/LLZTO/Li* 对称电池在0.1 mA·cm-2下实现了10 000 h的显著长循环寿命; Li*/LLZTO/NCA全电池在0.5C下500次循环后保持了73.4%的容量保持率;全固态Li*/LLZTO/FeF 2全电池在100 mA·g-1下500次循环后实现了147 mAh·g-1的可逆容量。这项工作展示了超稳定Li*/石榴石界面的潜在设计策略，以实现高性能SSLMB。
High interfacial resistance and uncontrollable lithium (Li) dendrite are major challenges in solid-state Li-metal batteries (SSLMBs), as they lead to premature short-circuiting and failure of SSLMBs. Here, we report the synthesis of a composite anode comprising a three-dimensional LiCuxnanowire network host infiltrated with Li (Li* anode) with low interfacial impedance and superior electrochemical performance. The Li* anode is fabricated by dissolving Cu foil into molten Li followed by solidification. The Li* anode exhibits good wettability with Li6.4La3Zr1.4Ta0.6O12(LLZTO) and high mechanical strength, rendering low Li*/LLZTO interfacial impedance, homogeneous deposition of Li, and suppression of Li dendrites. Consequently, the Li* anode-based symmetric cells and full cells with LiNi0.88Co0.1Al0.02O2(NCA), LiFePO4(LFP), and FeF2cathodes deliver remarkable electrochemical performance. Specifically, the Li*/LLZTO/Li* symmetrical cell achieves a remarkably long cycle lifetime of 10 000 h with 0.1 mA·cm–2; the Li*/LLZTO/NCA full cell maintains capacity retention of 73.4% after 500 cycles at 0.5C; and all-solid-state Li*/LLZTO/FeF2full cell achieves a reversible capacity of 147 mAh·g–1after 500 cycles at 100 mA·g–1. This work demonstrates potential design tactics for an ultrastable Li*/garnet interface to enable high-performance SSLMBs.