Active material, lithium-ion secondary battery, and method of manufacturing active material
A technology of active material and manufacturing method, which is applied in the direction of secondary batteries, battery electrodes, chemical instruments and methods, etc., can solve the problems that lithium-ion secondary batteries cannot obtain sufficient reversible capacity and rate characteristics, and achieve the effect of improving discharge capacity
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Embodiment 1
[0060] In the production of the active material of Example 1, a liquid mixture containing the following raw materials was prepared.
[0061] Lithium source: 4.24g (0.10mol) of LiOH·H 2 O (molecular weight=41.96, manufactured by Nacalai Tesque, Inc., special grade, purity 99% by weight).
[0062] Phosphoric acid source: 34.59g (0.30mol) of H3 PO 4 (Molecular weight=98.00, manufactured by Nacalai Tesque, Inc., grade 1, purity: 85% by weight)
[0063] Vanadium source: 9.19g (0.05mol) of V 2 o 5 (Molecular weight=181.88, manufactured by Nacalai Tesque, Inc., special grade, purity: 99% by weight)
[0064] 200 g of distilled water (manufactured by Nacalai Tesque, Inc., for HPLC (high performance liquid chromatography)). In addition, an additional 30 g of distilled water was used between the glass vessel and the autoclave.
[0065] Reducing agent: 1.28g (0.025mol) of NH 2 NH 2 ·H 2 O (molecular weight=50.06, manufactured by Nacalai Tesque, Inc., special grade, purity: 98% by...
Embodiment 2～7、 comparative example 1～4
[0079] In Examples 2-7 and Comparative Examples 1-4, [Li] / [V] and [P] / [V] were adjusted to the values shown in Table 1, respectively. In Examples 2-7 and Comparative Examples 1-4, the compound shown in Table 1 was used as a reducing agent. In addition, in Comparative Examples 1 and 2, no reducing agent was used. In the hydrothermal synthesis process of Examples 2 to 7 and Comparative Examples 1 to 4, the pH value of the mixed solution immediately before heating in an autoclave (hereinafter referred to as "pH 前 ") is the value shown in Table 1. The pH value of the solution before washing after the hydrothermal synthesis process of Examples 2-7 and Comparative Examples 1-4 (hereinafter referred to as "pH 后 ”) is the value shown in Table 1.
[0080] Except for the above matters, each active material of Examples 2-7 and Comparative Examples 1-4 was obtained by the method similar to Example 1.
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