|
1
|
Wang Y, Fang T, Wang C, Wang S, Yang K, Biao J, Li D, Yang D, He YB, Xia Y. Oxygen Vacancy-Li 2ZrO 3: A New Choice for Boosting Homogenous Distribution and Transport of Lithium Ion in Composite Solid-State Electrolytes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2025:e2505209. [PMID: 40401381 DOI: 10.1002/adma.202505209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2025] [Revised: 04/18/2025] [Indexed: 05/23/2025]
Abstract
The low concentration and inhomogenous distribution of free lithium ion (Li+) in composite polymer electrolytes (CPEs) greatly restrict the Li+ transport, cycle stability and rate performance of all solid-state batteries. In this work, lithium zirconate with superficial oxygen (O)-vacancies (O-LZO) is reported as a new Li+ conductors for polyethylene oxide (PEO)-based CPEs (PEO@O-LZO). The O-LZO demonstrates exceptional Li+ transport capability, and its superficial O-vacancies efficiently adsorb anions to facilitate the dissociation of lithium salts, leading a high concentration of free Li+ in CPEs. Furthermore, the electropositive equilibrium charge layer of O-vacancies avoids the aggregation of Li+ near the filler and achieves a stable interface to promote the efficient and continuous Li+ transport. These effects contribute to a high Li+ conductivity of 1.63 × 10-4 S cm-1 and a Li+ migration number of 0.35 for PEO@O-LZO at 40 °C. The assembled battery (LiFePO4/PEO@O-LZO/Li) exhibits a capacity of 120 mAh g-1 at 3 C and stable cycling performance with an 80.5% capacity retention after 800 cycles at 1 C and 40 °C, maintaining excellent coulombic efficiency. This work provides a design principle of fillers to regulate Li+ concentration and distribution in CPEs for efficient solid-state lithium metal batteries.
Collapse
Affiliation(s)
- Yanru Wang
- State Key Laboratory of Biofibers and Eco-textiles, College of Materials Science and Engineering, Institute of Marine Bio-based Materials, Qingdao University, Qingdao, 266071, P. R. China
| | - Timing Fang
- State Key Laboratory of Biofibers and Eco-textiles, College of Materials Science and Engineering, Institute of Marine Bio-based Materials, Qingdao University, Qingdao, 266071, P. R. China
| | - Chao Wang
- State Key Laboratory of Biofibers and Eco-textiles, College of Materials Science and Engineering, Institute of Marine Bio-based Materials, Qingdao University, Qingdao, 266071, P. R. China
| | - Siyu Wang
- State Key Laboratory of Biofibers and Eco-textiles, College of Materials Science and Engineering, Institute of Marine Bio-based Materials, Qingdao University, Qingdao, 266071, P. R. China
| | - Ke Yang
- Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center, Institute of Materials Research (IMR), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
| | - Jie Biao
- Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center, Institute of Materials Research (IMR), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
| | - Daohao Li
- State Key Laboratory of Biofibers and Eco-textiles, College of Materials Science and Engineering, Institute of Marine Bio-based Materials, Qingdao University, Qingdao, 266071, P. R. China
| | - Dongjiang Yang
- State Key Laboratory of Biofibers and Eco-textiles, College of Materials Science and Engineering, Institute of Marine Bio-based Materials, Qingdao University, Qingdao, 266071, P. R. China
- Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo, 315211, P. R. China
| | - Yan-Bing He
- Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center, Institute of Materials Research (IMR), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
| | - Yanzhi Xia
- State Key Laboratory of Biofibers and Eco-textiles, College of Materials Science and Engineering, Institute of Marine Bio-based Materials, Qingdao University, Qingdao, 266071, P. R. China
| |
Collapse
|
|
2
|
Meena DK, Kumawat S, Anuradha, Jain V, Arora G. Inelastic scattering and first principles study of tritium breeder materials Li2TiO3 and Li2ZrO3. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|