High-energy long-cycling all-solid-state lithium metal batteries enabled by silver–carbon composite anodes

Yong-Gun Lee (), Satoshi Fujiki, Changhoon Jung, Naoki Suzuki, Nobuyoshi Yashiro, Ryo Omoda, Dong-Su Ko, Tomoyuki Shiratsuchi, Toshinori Sugimoto, Saebom Ryu, Jun Hwan Ku, Taku Watanabe, Youngsin Park, Yuichi Aihara (), Dongmin Im () and In Taek Han
Additional contact information
Yong-Gun Lee: Samsung Electronics Co., Ltd
Satoshi Fujiki: Samsung R&D Institute Japan
Changhoon Jung: Samsung Electronics Co., Ltd
Naoki Suzuki: Samsung R&D Institute Japan
Nobuyoshi Yashiro: Samsung R&D Institute Japan
Ryo Omoda: Samsung R&D Institute Japan
Dong-Su Ko: Samsung Electronics Co., Ltd
Tomoyuki Shiratsuchi: Samsung R&D Institute Japan
Toshinori Sugimoto: Samsung Electronics Co., Ltd
Saebom Ryu: Samsung Electronics Co., Ltd
Jun Hwan Ku: Samsung Electronics Co., Ltd
Taku Watanabe: Samsung R&D Institute Japan
Youngsin Park: Samsung Electronics Co., Ltd
Yuichi Aihara: Samsung R&D Institute Japan
Dongmin Im: Samsung Electronics Co., Ltd
In Taek Han: Samsung Electronics Co., Ltd

Nature Energy, 2020, vol. 5, issue 4, 299-308

Abstract: Abstract An all-solid-state battery with a lithium metal anode is a strong candidate for surpassing conventional lithium-ion battery capabilities. However, undesirable Li dendrite growth and low Coulombic efficiency impede their practical application. Here we report that a high-performance all-solid-state lithium metal battery with a sulfide electrolyte is enabled by a Ag–C composite anode with no excess Li. We show that the thin Ag–C layer can effectively regulate Li deposition, which leads to a genuinely long electrochemical cyclability. In our full-cell demonstrations, we employed a high-Ni layered oxide cathode with a high specific capacity (>210 mAh g−1) and high areal capacity (>6.8 mAh cm−2) and an argyrodite-type sulfide electrolyte. A warm isostatic pressing technique was also introduced to improve the contact between the electrode and the electrolyte. A prototype pouch cell (0.6 Ah) thus prepared exhibited a high energy density (>900 Wh l−1), stable Coulombic efficiency over 99.8% and long cycle life (1,000 times).

Date: 2020
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DOI: 10.1038/s41560-020-0575-z

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