Mixed Electronic and Ionic Conductor-Coated Cathode Material for High-Voltage Lithium Ion Battery
- Authors
- Shim, Jae-Hyun; Han, Jung-Min; Lee, Joon-Hyung; Lee, Sanghun
- Issue Date
- 18-May-2016
- Publisher
- AMER CHEMICAL SOC
- Keywords
- lithium ion battery; mixed electronic and ionic conductor; lithium cobalt oxide; high-voltage cell; full cell application
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.8, no.19, pp.12205 - 12210
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 8
- Number
- 19
- Start Page
- 12205
- End Page
- 12210
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/8288
- DOI
- 10.1021/acsami.6b03113
- ISSN
- 1944-8244
- Abstract
- A lithium ionic conductor, Li1.3Al0.3Ti1.7(PO4)(3) (LATP), is introduced as a coating material on the surface of Mg-doped LiCoO2 to improve electrochemical performances for high-voltage (4.5 V) lithium ion batteries. Structure, morphology, elemental distribution; and electrical properties of the materials are thoroughly characterized by SEM, TEM, EELS, EDS, and C-AFM. The coating layer is electrically conductive with the aid of Mg ions which are used as a dopant for the active materials; therefore, this mixed electronic ionic conductor strongly enhances the electrochemical performances of initial capacity, cycling property, and rate capability. The LATP coating layer also demonstrates very promising applicability for 4.4 V prismatic full cells with graphite anode, which correspond to the 4.5 V half-cells with lithium anode. The 2900 mA h full cells show 85% of capacity retention after 500 cycles and more than 60% after 700 cycles.
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