2011年
Fabrication of electrode-electrolyte interfaces in all-solid-state rechargeable lithium batteries by using a supercooled liquid state of the glassy electrolytes
JOURNAL OF MATERIALS CHEMISTRY
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- 巻
- 21
- 号
- 1
- 開始ページ
- 118
- 終了ページ
- 124
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1039/c0jm01090a
- 出版者・発行元
- ROYAL SOC CHEMISTRY
The softening behavior of a 80Li(2)S center dot 20P(2)S(5) (mol%) glass electrolyte was investigated and a favorable electrode-electrolyte interface was fabricated by sticking the supercooled liquid state of the 80Li(2)S center dot 20P(2)S(5) electrolyte on active material particles. A dense pellet of the glass electrolyte without an obvious grain boundary or any voids was prepared by softening the 80Li(2)S center dot 20P(2)S(5) glass by means of a hot press. The electrical conductivity of the pellet was 8.8 x 10(-4) S cm(-1) at room temperature. Sticking the solid electrolyte on the Li4Ti5O12 active material particles increased the contact area at the electrode-electrolyte interface and the utilization of the active material was increased in the all-solid-state cells. However, LiCoO2 reacted with the solid electrolyte during the hot press and the electrochemical performance of the cells using hot-pressed LiCoO2 with the glass electrolyte degraded. LiNbO3 coating suppressed the reaction of LiCoO2 with the solid electrolyte. The all-solid-state full-cell Li4Ti5O12/ 80Li(2)S center dot 20P(2)S(5) glass/LiNbO3-coated LiCoO2 prepared by hot press showed a larger reversible capacity of 120 mAh g(-1) at 0.064 mA cm(-2) compared with the full-cell prepared by cold press. The softening of the 80Li(2)S center dot 20P(2)S(5) glass electrolyte is an effective way for increasing the contact area between the active materials and solid electrolyte.
- リンク情報
- ID情報
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- DOI : 10.1039/c0jm01090a
- ISSN : 0959-9428
- ORCIDのPut Code : 45576420
- Web of Science ID : WOS:000285067300014