Method for increasing electrochemical lithium storage content of nano-carbon tube

A carbon nanotube, electrochemical technology, applied in the direction of circuit, electrode manufacturing, electrical components, etc., can solve the problems of low output voltage, small output, high cost, etc., achieve large output current, improve utilization rate, and increase diffusion coefficient Effect
CN1688046AInactive Publication Date: 2005-10-26TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2005-10-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention discloses a method for increasing electrochemical Li-storage capacity of carbon nm tubes, which processes the original MWNTS raw material prepared with chemical gas phase deposition method including: first of all, the original MWNTS is supersonic-vibrated, mechanical mixed and dipped under room temperature in different matched volumes of H2SO4 and HNO3 mixed solution, the reacted product is cleaned with deionized water to neutral and put in a tube oven to be heated under 200-500deg.C to be cooled and dipped in Li2CO3 or LiOH solution, the obtained sample is cleaned with deionized water, filtered and dried in vacuum. The gap of quasigraphite layer of the processed MWNTS is expanded, the electrochemical Li capacity is increased.
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Description

technical field

[0001] The invention belongs to the technical field of high-energy batteries. In particular, it relates to a method for improving the electrochemical lithium storage capacity of carbon nanotubes for preparing high-capacity carbon nanotube negative electrode materials suitable for various non-aqueous electrolyte lithium ion secondary batteries. Background technique

[0002] Lithium secondary batteries, which are used as the main power supply of mobile communication equipment and portable electronic equipment, have become a research hotspot at home and abroad due to their excellent performance such as high output voltage and high energy density. However, in a lithium secondary battery using lithium metal as the negative electrode material, dendrites are precipitated on the negative electrode during charging. As a result of repeated charge and discharge, the dendrites will break through the separator and reach the positive electrode, causing a short circuit insi...

Claims

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