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Meta-stable vanadium oxide cathode materials for rechargeable magnesium battery

A magnesium storage battery and cathode technology, applied in vanadium oxide, battery electrodes, secondary batteries, etc., can solve problems such as reducing the energy density of batteries

Active Publication Date: 2016-04-27
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the lower voltage reduces the energy density of the battery

Method used

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  • Meta-stable vanadium oxide cathode materials for rechargeable magnesium battery
  • Meta-stable vanadium oxide cathode materials for rechargeable magnesium battery
  • Meta-stable vanadium oxide cathode materials for rechargeable magnesium battery

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Experimental program
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Effect test

Embodiment

[0089] By ball milling V at 370 rpm in an Ar atmosphere 2 o 5 and P 2 o 5 Materials 20 hr to prepare the test materials listed in Table 1. Balls and jars for milling synthesis made of ZrO 2 production. After ball milling, the samples were annealed into a metastable phase and a thermodynamically stable phase, respectively, under an atmosphere of ambient air.

[0090]

[0091] image 3 shows a thermodynamically stable crystalline V 2 o 5 :P 2 o 5 (75:25 molar ratio), amorphous V 2 o 5 :P 2 o 5 (75:25 molar ratio), metastable V 2 o 5 :P 2 o 5 (75:25 molar ratio) and crystal V 2 o 5 The XRD pattern. After preparing the amorphous material as above, the metastable phase V was obtained by annealing at 325 °C for 5 h 2 o 5 :P 2 o 5 (75:25 molar ratio), and crystalline V was obtained by annealing at 450 °C for 5 h 2 o 5 :P 2 o 5 (75:25 molar ratio).

[0092] Figure 4 shows the thermodynamically stable crystalline V 2 o 5 :P 2 o 5 (75:25 molar ratio),...

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Abstract

A magnesium electrochemical cell having a positive electrode containing as an active ingredient, a material of formula [V2O5]c[MaOb]d and / or a material of formula [V2O5]c[MaOb]d[MgXe]g in a meta-stable structural and morphological phase is provided. In the formulas M is an element selected from the group consisting of P, B, Si, Ge and Mo; and X is 0 or a halide.

Description

Background technique [0001] The present invention relates to a positive electrode active material for magnesium secondary batteries and a magnesium battery having a cathode based on the active material. [0002] Lithium-ion batteries have been in commercial use since 1991 and are often used as a power source for portable electronic devices. The technology related to the structure and composition of lithium-ion batteries (LIBs) is the subject of research and improvement, and has matured to a certain extent: state-of-the-art LIB batteries have been reported to have energy densities of up to 700 Wh / L. However, even the state-of-the-art LIB technology is not considered feasible as a power source capable of meeting the requirements of future commercial electric vehicles (EVs). For example, in order for a 300 mile range EV to have a powertrain equivalent to today's conventional internal combustion engine vehicles, an EV battery pack with an energy density of approximately 2000 Wh / L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/131H01M10/054
CPCH01M4/131H01M4/483H01M10/054C01G31/02C01P2002/72C01P2004/03C01P2004/61C01P2006/40H01M4/485H01M4/5825Y02E60/10
Inventor T·S·阿瑟尔水野史教张瑞刚
Owner TOYOTA JIDOSHA KK