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图5 (a) 单斜NaVPO4F的晶体结构及(b) 四方NaVPO4F的充放电曲线;(c) 单斜NaVPO4F的充放电曲线
(c) charge/discharge profiles of monoclinic NaVPO4F
Fig.5 (a) crystal structure of monoclinic NaVPO4F; (b) charge/discharge profiles of tetragonal NaVPO4F, and