The application provides a
manganese-based composite
lithium supplement agent with adjustable phase structure and a preparation method and application thereof, and belongs to the technical field of
lithium ion battery
lithium supplement. The application provides a preparation method of the
manganese-based composite lithium supplement agent with adjustable phase structure, which comprises the following steps: mixing
manganese oxide and a lithium source to obtain a mixture; the
manganese oxide is a mixture of any one or more of manganese
sesquioxide, manganese dioxide and trimanganese tetraoxide and
manganese monoxide; the mixture is pre-sintered, then
solid-phase sintered, and finally crushed to obtain the manganese-based composite lithium supplement agent with adjustable phase structure. The results of the examples show that the first circle charge specific capacity (~4.8V) of the battery prepared from the manganese-based composite lithium supplement agent provided by the application can reach about 800-900 mAh / g, and the
energy density of the battery is significantly improved.