Optimization of high potential cathode materials and lithium conducting hybrid solid electrolyte for high-voltage all-solid-state batteries
- Authors
- Yu, Hakgyoon; Han, Jong Su; Hwang, Gil Chan; Cho, Jung Sang; Kang, Dong-Won; Kim, Jae-Kwang
- Issue Date
- Jan-2021
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- LiMn(0.8)Ee(0.2)PO(4); Crystal structure; Scavenging effect; High voltage; All-solid-state battery
- Citation
- ELECTROCHIMICA ACTA, v.365
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 365
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/54110
- DOI
- 10.1016/j.electacta.2020.137349
- ISSN
- 0013-4686
1873-3859
- Abstract
- LiMn0.8Fe0.2PO4 (LMFP) as high potential cathode is synthesized by a modified mechanical activation method and tested for use in all-solid-state high-voltage rechargeable lithium ion batteries. The influence of synthesis condition on the atomic structure, particle size, morphology, surface area, and electrochemical performance of the active material is investigated. A high dielectric constant ceramic (Al2O3) is composited in Li1.3Al0.3Ge1.7P3O12 (LAGP)-based lithium conducting hybrid solid electrolyte, and a higher lithium ion transference number is observed owing to the anion scavenging effect of Al2O3. An all -solidstate LMFP battery is constructed with a graphite anode and the hybrid solid electrolyte. At current densities of 0.1, 1, 3, and 10 C, initial discharge capacities of 156.3, 133.7, 111.8, and 71.4 mAh g(-1) (91.9, 78.6, 65.8, and 42% of theoretical capacity) are obtained with low corresponding capacity fade of 0.001, 0.02, 0.01, and 0.013% per cycle evaluated over 300 cycles, even after charging to 4.5 V. (c) 2020 Elsevier Ltd. All rights reserved.
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Collections - College of Engineering > School of Energy System Engineering > 1. Journal Articles
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