Tin-manganese stannate-nitrogen carbon composite material with hollow cubic structure as well as preparation method and application thereof

A technology of composite materials and cubes, applied in nanotechnology, structural parts, active material electrodes, etc. for materials and surface science, can solve poor performance and unstudied electrochemical performance of tin-carbon composite nanoparticles sodium-ion battery anode materials And other issues
CN113363441AActive Publication Date: 2021-09-07多助科技(武汉)有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
多助科技(武汉)有限公司
Publication Date
2021-09-07

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Abstract

The invention discloses a tin-manganese stannate-nitrogen carbon composite material with a hollow cubic structure as well as a preparation method and application thereof. The composite material is prepared by taking zinc hydroxystannate as a Sn source precursor, potassium permanganate as a Mn source precursor and dopamine as a nitrogen-doped carbon precursor through a multi-step hydrothermal method and a high-temperature carbonization method. The composite material is of a hollow cubic structure, and the cubic structure can provide enough space to buffer volume expansion during charging and discharging, so the pulverization of an electrode is prevented. Meanwhile, the carbon layer wrapped on the outer layer of the composite material relieves the stress of the volume change of the electrode on one hand, and improves the conductivity of the material on the other hand. Particularly, nitrogen atoms are doped, so that the carbon material has more defects, the conductivity of electrons / ions is improved, the transmission of the electrons / ions is accelerated, and the specific capacity and the cycle performance of the material are improved.
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Description

technical field

[0001] The present invention relates to the technical field of electrode materials for sodium ion batteries, more specifically, to a hollow cubic structure of tin-manganese stannate-nitrogen carbon (Sn@Mn 2 SnO 4 -NC) composite material preparation method and its application. Background technique

[0002] Lithium-ion batteries are already the main power behind a variety of portable electronics and electric vehicles. However, the limitations and uneven distribution of lithium resources in the earth's crust make it unable to meet the growing demand for energy storage devices. Na-ion batteries are considered as a promising alternative due to their natural abundance and environmental friendliness. Tin-based materials are popular anode materials in the field of batteries, with high theoretical specific capacity. Using tin-based materials as anode materials for sodium batteries should theoretically have good specific capacity and stable cycle performance. Howev...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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