Carbon-free Mn-doped LiFePO4 cathode for highly transparent thin-film batteries
- Title
- Carbon-free Mn-doped LiFePO4 cathode for highly transparent thin-film batteries
- Author
- 김상태
- Keywords
- Lithium thin-film battery; Transparent; Olivine; LiFe1-xMnxPO4
- Issue Date
- 2019-09
- Publisher
- ELSEVIER SCIENCE BV
- Citation
- JOURNAL OF POWER SOURCES, v. 434, article no. 226713
- Abstract
- The search for transparent battery cathodes primarily focuses on patterned electrodes with feature sizes below the optical absorption limit. This significantly limits the electrode capacity, as a large electrode area remains unused to maintain transparency. Herein, we report transparent olivine LiFe0.77Mn0.23PO4 thin-film electrodes discovered through high-throughput continuous-composition-spread sputtering. After investigating six different Mn doping ratios, we found the optimal Mn-doped olivine composition with an enhanced discharge capacity of 45.7 mu A h/cm(2).mu m without using excessive nanosized features or carbon coating. The thin-film electrode exhibits a clear redox activity for both Fe3+/2+ and Mn3+/2+, resulting in an enhanced average voltage over LiFePO4 composition. A 250-nm-thick film exhibits an optical transmittance of over 80% in the visible region. The results in this study demonstrates that transparent cathode thin films can be developed based on phospho-olivines via doping strategies with high-throughput continuous-composition-spread sputtering methods.
- URI
- https://www.sciencedirect.com/science/article/pii/S0378775319306846?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/153942
- ISSN
- 0378-7753; 1873-2755
- DOI
- 10.1016/j.jpowsour.2019.226713
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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