Column quinone positive pole material for lithium ion battery and application thereof

Abstract

The invention relates to a column quinone positive pole material for a lithium ion battery, wherein the material is a cyclic compound which is formed by connecting 5-7 p-benzoquinone units in para-positions through methylene by taking carbonyls of the p-benzoquinone units as electrochemical redox reaction sites. The column quinone positive pole material is used for preparing a solid state lithium ion battery. The method comprises the following steps: 1) grinding an active matter, a conductive agent and a binder in an organic solvent to form a paste, coating the paste on a current collector, and drying in air to prepare an electrode; 2) by taking the electrode as a positive pole and lithium metal as a counter electrode and a reference electrode, separating the two electrodes by a PMA / PEG (Polymethyl Methacrylate / Polyethylene Glycol) gel polymer electrolyte, and assembling in argon or dried air to form the battery. The material provided by the invention has the advantages that the column quinone positive pole material has high carbonyl utilization ratio and high specific capacity; the column quinone positive pole material applied to a quasi solid lithium ion battery is high in specific discharge capacity and good in cycle performance, and is expected to be applied to the next generation of energy storage batteries with high high-energy density, high power density and long cycle life.

Description

technical field [0001] The invention relates to an organic positive electrode material for a lithium ion battery, in particular to a pillar quinone positive electrode material for a lithium ion battery and an application thereof. Background technique [0002] Due to the advantages of high operating voltage, high energy density and long cycle life, lithium-ion batteries have played a pivotal role in the field of portable electronic products. In recent years, the development of electric vehicles and smart grids has put forward higher requirements for energy storage devices. The research and development of new energy materials with high specific energy has become the focus of the further development of lithium-ion batteries. [0003] At present, the anode materials of lithium-ion batteries are mainly inorganic materials based on transition metal oxides of lithium, and the actual capacity of such materials is generally lower than 170mAh g -1 , is the main bottleneck limiting th...

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Problems solved by technology

However, due to the influence of steric hindrance in most molecular structures containing multiple carbonyl functional groups, only half or less of the carbonyl groups can participate in the reaction, resulting in a much lower actual capacity than the theoretical capacity.

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