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High capacity cathode material for magnesium battery

一种电极活性材料、镁电池的技术，应用在非水电解质蓄电池电极、电池电极、二次电池等方向，能够解决没有描述物理和化学因素等问题

Active Publication Date: 2014-10-01
TOYOTA JIDOSHA KK
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, α-MnO affecting the capacity of this cathode material is not described 2 physical and chemical factors, and how to optimize these physical factors to improve the performance of the cathode

Method used

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  • High capacity cathode material for magnesium battery
  • High capacity cathode material for magnesium battery
  • High capacity cathode material for magnesium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0059] α-MnO 2 The preparation of is carried out in two steps. In the first step, by heating the electrolyzed MnO in air at 700 °C 2 powder for 4 hours to prepare Mn 2 O 3 . In the second step, make 0.01 mole of Mn 2 O 3 with 100ml of 4.5M H 2 SO 4 reaction at 107 °C (the boiling point of this solution), which leads to Mn 2 O 3 become soluble Mn 2+ Substance and α-MnO 2 disproportionation reaction. The morphology of the product is nanorods (nano rods)-like material.

[0060] If M is added during synthesis 2 SO 4 (M=K + , Rb + or NH 4 + ), then K can be obtained respectively + , Rb + or NH 4 + Stabilized α-MnO 2 . However, if no M is added 2 SO 4 , then H will be obtained 3 O + Stabilized α-MnO 2 .

[0061] The number of stable ions can be controlled by K 2 SO 4 , Rb 2 SO 4 or (NH 4 ) 2 SO 4 The amount of addition to change. In this example, potassium-stabilized MnO was prepared by controlling the molar ratio of stabilizing ions to Mn in th...

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Abstract

An electrode active material, containing α-MnO2 which is stabilized with a stabilizing cation or molecule with a radius of from 1.35 to 1.55 Å, and wherein a molar ratio of the stabilizing ion or molecule to Mn is from 0.1 to 0.125, is provided. Also provided are a magnesium electrochemical cell having a cathode containing the stabilized α-MnO2 and a rechargeable magnesium battery having a cathode containing the stabilized α-MnO2.

Description

technical field [0001] The present invention relates to α-MnO containing as active cathode material with specific chemical and physical properties 2 Magnesium electrochemical cells that provide high cell capacity and improved cycle life. The present invention also relates to a compound containing α-MnO 2 Magnesium accumulator with cathode as active component. Background technique [0002] Lithium-ion batteries have been in commercial use since 1991 and have generally been used as a power source for portable electronic devices. The technology related to the structure and composition of lithium-ion batteries (LIBs) has been the subject of research and improvement, and has matured to the extent that state-of-the-art LIB batteries have been reported to have energy densities as high as 700 Wh / L. However, even the state-of-the-art LIB technology is not considered feasible as a power source capable of meeting future requirements for commercial electric vehicles (EVs). For examp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505
CPCH01M4/502H01M4/13H01M10/054Y02E60/10
Inventor 水野史教张瑞刚
Owner TOYOTA JIDOSHA KK
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