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Zheng J, Sun C, Wang Z, Liu S, An B, Sun Z, Li F. Double Ionic-Electronic Transfer Interface Layers for All-Solid-State Lithium Batteries. Angew Chem Int Ed Engl 2021; 60:18448-18453. [PMID: 34018293 DOI: 10.1002/anie.202104183] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/19/2021] [Indexed: 11/10/2022]
Abstract
Large-scale implementation of all-solid-state lithium batteries is impeded by the physical limitations of the interface between the electrode and solid electrolyte; specifically, high resistance and poor stability, as well as poor compatibility with Li+ migration. We report double ionic-electronic transfer interface layers grown at electrode-electrolyte interfaces by in situ polymerization of 2,2'-bithiophene in polyethylene oxide (PEO) electrolyte. For all-solid-state LiFePO4 ∥PT-PEO-PT∥Li cells, the formation of a conductive polythiophene (PT) layer at the cathode-electrolyte interface resulted in an at least sevenfold decrease in interface resistance, and realized a capacity retention of about 94 % after 1000 cycles along with a lower polarization voltage under a rate of 2 C. The mixed ionic-electronic conductive layers imparted superior interface stability and contact while keeping good compatibility with the Li anode.
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Affiliation(s)
- Jingang Zheng
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, China
| | - Chengguo Sun
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, China.,Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China.,School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Zhenxing Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China
| | - Shaojun Liu
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, China
| | - Baigang An
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, China
| | - Zhenhua Sun
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China
| | - Feng Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China
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