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- Title
Effect of ex situ hydrogenation on the structure and electrochemical properties of amorphous silicon thin film.
- Authors
Zhang, Hai-min; Luo, Yong-chun; Yang, Song-ting; Xiang, Yu-jie
- Abstract
Nickel-metal hydride (Ni-MH) batteries were widely used due to their various advantages, but its further application and development have been seriously hindered by the low electrochemical discharge capacity of conventional hydrogen storage alloy electrode. The hydrogenated amorphous silicon (a-Si:H) thin film electrode for Ni-MH battery has been proven to have a dramatic electrochemical capacity. We prepared a-Si:H thin films by a two-step process of rf-sputtering followed by hydrogenation, and investigated the effect of hydrogenation on the structure and electrochemical properties of which as an anode. The maximum discharge capacity of a-Si:H thin film electrode after hydrogenation increases from initial 180 mAh·g−1to 1827 mAh·g−1, which is over tenfold that of as-deposited hydrogen-less a-Si thin film electrode. Then, the preliminary relationships between hydrogen content and electrochemical performance of a-Si:H thin film electrode were analyzed, and several negative factors of electrochemical performance for a-Si:H thin film electrode were proposed.
- Subjects
SILICON films; THIN films; AMORPHOUS silicon; HYDROGENATED amorphous silicon; HYDROGENATION; HYDROGEN storage
- Publication
Journal of Solid State Electrochemistry, 2021, Vol 25, Issue 10/11, p2539
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-021-05038-1