Details

Autor(en) / Beteiligte

• Kwon, Hyeokjin
• Choi, Hyun-Ji
• Jang, Jung-Kyu
• Lee, Jinhong
• Jung, Jinkwan
• Lee, Wonjun
• Roh, Youngil
• Baek, Jaewon
• Shin, Dong Jae
• Lee, Ju-Hyuk
• Choi, Nam-Soon
• Meng, Ying Shirley
• Kim, Hee-Tak

Titel

Weakly coordinated Li ion in single-ion-conductor-based composite enabling low electrolyte content Li-metal batteries

Ist Teil von

• Nature communications, 2023-07, Vol.14 (1), p.4047-4047, Article 4047

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The pulverization of lithium metal electrodes during cycling recently has been suppressed through various techniques, but the issue of irreversible consumption of the electrolyte remains a critical challenge, hindering the progress of energy-dense lithium metal batteries. Here, we design a single-ion-conductor-based composite layer on the lithium metal electrode, which significantly reduces the liquid electrolyte loss via adjusting the solvation environment of moving Li in the layer. A Li||Ni Mn Co O pouch cell with a thin lithium metal (N/P of 2.15), high loading cathode (21.5 mg cm ), and carbonate electrolyte achieves 400 cycles at the electrolyte to capacity ratio of 2.15 g Ah (2.44 g Ah including mass of composite layer) or 100 cycles at 1.28 g Ah (1.57 g Ah including mass of composite layer) under a stack pressure of 280 kPa (0.2 C charge with a constant voltage charge at 4.3 V to 0.05 C and 1.0 C discharge within a voltage window of 4.3 V to 3.0 V). The rational design of the single-ion-conductor-based composite layer demonstrated in this work provides a way forward for constructing energy-dense rechargeable lithium metal batteries with minimal electrolyte content.