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Robust All-Solid-State Lithium Metal Batteries Enabled by a Composite Lithium Anode with Improved Bulk Li Diffusion Kinetics Properties
ACS Nano ( IF 15.8 ) Pub Date : 2023-11-21 , DOI: 10.1021/acsnano.3c09853 Shuxian Zhang 1 , Jianchao Chen 1 , Chunyan Zhu 1 , Qingyuan Liu 1 , Qingyu Li 1 , Renbo Liu 1 , Xiaobo Jiang 1 , Yijie Yan 1 , Shengjian Sun 1 , Longwei Yin 1 , Rutao Wang 1
ACS Nano ( IF 15.8 ) Pub Date : 2023-11-21 , DOI: 10.1021/acsnano.3c09853 Shuxian Zhang 1 , Jianchao Chen 1 , Chunyan Zhu 1 , Qingyuan Liu 1 , Qingyu Li 1 , Renbo Liu 1 , Xiaobo Jiang 1 , Yijie Yan 1 , Shengjian Sun 1 , Longwei Yin 1 , Rutao Wang 1
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All-solid-state batteries (ASSBs) with a Li metal anode are expected to be one of the most promising energy storage systems to achieve high energy density. However, the interfacial instability between the Li metal anode and solid-state electrolyte (SSE) limits the rate capability and cycling stability of ASSBs. The main issue is the formation of voids at the Li/SSE interface during Li stripping due to the slow diffusion of Li within the bulk Li metal, then increasing internal cell resistance and inducing the formation of lithium dendrites. To address these issues, a composite Li anode (LAO) composed by Li–Ag alloy and Li2O is constructed by mixing the stoichiometric metal Li and Ag2O directly. LAO anode is capable of improving bulk Li diffusion kinetics and inhibiting the formation of interfacial voids effectively, achieving a high critical current density over 1.5 mA cm–2 and long stable cycling over 1000 h at 1 mA cm–2. The ASSBs, employing LAO as the anode, Li6PS5Cl as the SSE, and LiCoO2 as the cathode, exhibit superior rate capability and stable cycling over 4000 cycles at 5 C. Moreover, ASSBs can operate stably with a high LiCoO2 loading of 17.8 mg cm–2 for more than 100 cycles at 0.2 C.
中文翻译：
由复合锂阳极实现的坚固的全固态锂金属电池，具有改进的散装锂扩散动力学特性
具有锂金属阳极的全固态电池（ASSB）预计将成为最有前途的实现高能量密度的储能系统之一。然而，锂金属阳极和固态电解质（SSE）之间的界面不稳定性限制了ASSB的倍率性能和循环稳定性。主要问题是在Li剥离过程中，由于Li在块体Li金属中的缓慢扩散，在Li/SSE界面处形成空隙，然后增加电池内阻并诱导锂枝晶的形成。为了解决这些问题，通过直接混合化学计量金属Li和Ag 2 O构建了由Li-Ag合金和Li 2 O组成的复合锂阳极（LAO）。 LAO负极能够改善体锂扩散动力学并有效抑制界面空隙的形成，实现超过1.5 mA cm –2的高临界电流密度和在1 mA cm –2下超过1000小时的长期稳定循环。采用LAO作为阳极、Li 6 PS 5 Cl作为SSE、LiCoO 2作为阴极的ASSB在5 C下表现出优异的倍率性能和超过4000次循环的稳定循环。此外，ASSB可以在高LiCoO 2下稳定运行。在 0.2 C 下负载 17.8 mg cm –2超过 100 个循环。
更新日期：2023-11-21
中文翻译：
由复合锂阳极实现的坚固的全固态锂金属电池，具有改进的散装锂扩散动力学特性
具有锂金属阳极的全固态电池（ASSB）预计将成为最有前途的实现高能量密度的储能系统之一。然而，锂金属阳极和固态电解质（SSE）之间的界面不稳定性限制了ASSB的倍率性能和循环稳定性。主要问题是在Li剥离过程中，由于Li在块体Li金属中的缓慢扩散，在Li/SSE界面处形成空隙，然后增加电池内阻并诱导锂枝晶的形成。为了解决这些问题，通过直接混合化学计量金属Li和Ag 2 O构建了由Li-Ag合金和Li 2 O组成的复合锂阳极（LAO）。 LAO负极能够改善体锂扩散动力学并有效抑制界面空隙的形成，实现超过1.5 mA cm –2的高临界电流密度和在1 mA cm –2下超过1000小时的长期稳定循环。采用LAO作为阳极、Li 6 PS 5 Cl作为SSE、LiCoO 2作为阴极的ASSB在5 C下表现出优异的倍率性能和超过4000次循环的稳定循环。此外，ASSB可以在高LiCoO 2下稳定运行。在 0.2 C 下负载 17.8 mg cm –2超过 100 个循环。
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