Preparation method of tunnel phase manganese dioxide positive electrode material with high sodium content and high capacity

Preparation method of tunnel phase manganese dioxide positive electrode material with high sodium content and high capacity

The invention discloses a preparation method of a tunnel phase manganese dioxide positive electrode material with high sodium content and high capacity. The method comprises the following steps: firstly preparing alpha-phase manganese dioxide growing on carbon cloth, then soaking the alpha-phase man...

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Hauptverfasser: ZHAI TENG, XIA HUI, WAN YUEPING, CAO CHENG, LIU XUANMING, LI JIN, LIU JING
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Sprache:chi ; eng
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BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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creator ZHAI TENG
XIA HUI
WAN YUEPING
CAO CHENG
LIU XUANMING
LI JIN
LIU JING
description The invention discloses a preparation method of a tunnel phase manganese dioxide positive electrode material with high sodium content and high capacity. The method comprises the following steps: firstly preparing alpha-phase manganese dioxide growing on carbon cloth, then soaking the alpha-phase manganese dioxide in a sodium borohydride solution containing magnesium salt, carrying out liquid-phase reduction reaction, carrying out defect introduction on the material and carrying out ion pre-embedding of sodium ions and magnesium ions to obtain sodium-magnesium co-introduced tunnel-phase manganese dioxide, and then carrying out electrochemical activation treatment to obtain the sodium-magnesium co-introduced tunnel-phase manganese dioxide. And replacing the pre-occupied magnesium ions with sodium ions in situ to prepare the high-sodium-content and high-capacity tunnel-phase manganese dioxide. The method provided by the invention can break through the structural limitation of 0.44 sodium-manganese ratio of tunne
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subjects BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title Preparation method of tunnel phase manganese dioxide positive electrode material with high sodium content and high capacity
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