2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 1: Angell Intl. Symp. / Molten Salt, Ionic & Glass-forming Liquids: Processing and Sustainability
| Editors: | F. Kongoli, M. Gaune-Escard, J. Dupont, R. Fehrmann, A. Loidl, D. MacFarlane, R. Richert, M. Watanabe, L. Wondraczek, M. Yoshizawa-Fujita, Y. Yue |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 177 pages |
| ISBN: | 978-1-989820-00-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Enhancing the Li/Na-Ion Battery Performances by Disorder/Order Engineering
Yuanzheng Yue1;1AALBORG UNIVERSITY, Aalborg, Denmark;
Type of Paper: Keynote
Id Paper: 120
Topic: 13
Abstract:
We are facing big challenges in developing full-solid Li/Na ion batteries concerning the limited performances and problems of electrodes and solid electrolytes. There are, however, potential possibilities to overcome these challenges. In this presentation, we demonstrate a different route, that is, our disorder/ordering engineering concept [1] to develop high performance cathode/anode/electrolyte materials. The disorder/order engineering refers to two aspects. First, part of the disordered or glass structure in cathode/anode materials is transformed into the ordered domains. Second, the long-range ordered solids are transformed into disordered or amorphous ones. In this talk, we present three case studies concerning the effect of the disorder/order engineering on the electrochemical performances of cathodes, anodes, and solid electrolytes, respectively, for Li/Na-ion batteries.
Case 1: A series of vanadium-tellurite glasses with various V/Te ratios were synthesized via melt-quenching [1,2]. Then, the glass was pulverized and mixed with carbon to make Li-ion battery anodes. The anodes underwent discharging/charging cycles. During cycling, a fascinating phenomenon was observed, i.e., nanocrystals formed in glass matrix. As a consequence, the cycling stability and electronic/ionic conductivity of the anodes were enhanced. This kind of nanocrystal formation has a fundamentally different origin compared to the thermally induced crystallization [1,3].
Case 2: NaFePO4 with maricite structure, which is a thermodynamically stable phase, was considered to be electrochemically inactive for sodium-ion storage. Recently, we succeeded in creating disorder in the NaFePO4 cathode by a mechanochemical route to enhance electrochemical performances of Na-ion batteries [4]. The derived NaFePO4 cathodes containing both amorphous and maricite phases exhibit much improved sodium storage performance with an initial capacity of 115 mA h g-1 at 1 C and an excellent cycling stability of capacity retention of 91.3% after 800 cycles.
Case 3: The crystalline Ag3PS4 was transformed into amorphous state via a chemo-mechanical milling process. The Ag+ conductivity of the amorphous sample was found to be about three orders of magnitude higher than that of the crystalline counterpart. The amorphous sample exhibits lower activation energy (Ea) for the Ag+ migration, and hence, lower Ag+ conductivity compared to the crystalline one. By performing structural characterizations, we explored the origin of the enhanced Ag+ conductivity of the amorphous sample. The present study provides valuable information for developing solid electrolytes.
Keywords:
Electrochemical; Energy; Ion; Lithium; Materials; Storage;References:
1. Y.F. Zhang, P.X. Wang, T. Zheng, D.M. Li, G.D. Li, Y.Z. Yue. Enhancing Li-ion battery anode performances via disorder/order engineering. Nano Energy 49 (2018) 596-602.2. J. Kjeldsen, Y.Z. Yue, C.B. Bragatto, A.C.M. Rodrigues. Electronic Conductivity of Vanadium-Tellurite Glass-Ceramics. J. Non-Cryst. Solids 378 (2013) 196-200.
3. Y.F. Zhang, P.X. Wang, G.D. Li, J.H. Fan, C.W. Gao, Z.Y. Wang, Y.Z. Yue, Clarifying the charging induced nucleation in glass anode of Li-ion batteries and its enhanced performances, Nano Energy 57 (2019) 592-599.
4. F.Y. Xiong, Q.Y. An, L.X. Xia, Y.Zhao, L.Q. Mai, H.Z. Tao, Y.Z. Yue, Revealing the atomistic origin of the disorder-enhanced Na-storage performance in NaFePO4 battery cathode, Nano Energy 57 (2019) 608-615.