Single-Ion Conducting Soft Electrolytes for Semi-Solid Lithium Metal Batteries Enabling Cell Fabrication and Operation under Ambient Conditions

Kyeong Seok Oh, Jung Hui Kim, Se Hee Kim, Dongrak Oh, Sun Phil Han, Kwangeun Jung, Zhuyi Wang, Liyi Shi, Yongxiang Su, Taeeun Yim, Shuai Yuan, Sang Young Lee

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


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.

Original languageEnglish
Article number2101813
JournalAdvanced Energy Materials
Issue number38
Publication statusPublished - 2021 Oct 14

Bibliographical note

Funding 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.

Publisher Copyright:
© 2021 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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