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Tin-phosphate glass anode for sodium ion batteries
4. N. Yabuuchi, M. Kajiyama, J. Iwatate, H. Nishikawa, S. Hitomi, R. Okuyama, R. Usui, Y. Yamada, and S. Komaba, Nature Mater. 11, 512–517 (2012).
11. H. Yamauchi, A. Yamano, M. Morishita, T. Nagakane, G. Park, T. Sakai, T. Honma, T. Komatsu, F. Sato, H. Oshita, and A. Sakamoto, J. Electrochem. Soc. 160, A1725 (2013).
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The electrochemical property of tin-phosphate (designate as GSPO) glass anode for the sodium ion battery was studied. During the first charge process, sodium ion diffused into GSPO glass matrix and due to the reduction of Sn2+ to Sn0 state sodiated tin metal nano-size particles are formed in oxide glass matrix. After the second cycle, we confirmed the steady reversible reaction ∼320 mAh/g at 0–1 V cutoff voltage condition by alloying process in Na xSn4. The tin-phosphate glass is a promising candidate of new anode active material that realizes high energy density sodium ion batteries.
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