Despite their potential as post lithium-ion batteries, solid-state Li-metal batteries are struggling with insufficient electrochemical sustainability and ambient operation limitations. These challenges mainly stem from lack of reliable solid-state electrolytes. Here, a new class of single-ion conducting quasi-solid-state soft electrolyte (SICSE) for practical semi-solid Li-metal batteries (SSLMBs) is demonstrated. The SICSE consists of an ion-rectifying compliant skeleton and a nonflammable coordinated electrolyte. Rheology-tuned SICSE pastes, in combination with UV curing-assisted multistage printing, allow fabrication of seamlessly integrated SSLMBs (composed of a Li metal anode and LiNi0.8Co0.1Mn0.1 cathode) without undergoing high-pressure/high-temperature manufacturing steps. The single-ion conducting capability of the SICSE plays a viable role in stabilizing the interfaces with the electrodes. The resulting SSLMB full cell exhibits stable cycling performance and bipolar configurations with tunable voltages and high gravimetric/volumetric energy densities (476 Wh kgcell−1/1102 Wh Lcell−1 at four-stacked cells with 16.656 V) under ambient operating conditions, along with low-temperature performance, mechanical foldability, and nonflammability.
|Journal||Advanced Energy Materials|
|Publication status||Published - 2021 Oct 14|
Bibliographical noteFunding Information:
This work was supported by the Basic Science Research Program (2016R1A5A1009926, 2017M1A2A2087812, 2018M3D1A1058744, and 2021R1A2B5B03001615) through the National Research Foundation of Korea (NRF) grant by the Korean Government (MSIT) and Yonsei University Research Fund of 2020‐22‐0536.
© 2021 Wiley-VCH GmbH
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)