Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of carbon nanotube @ ternary @ silver composite material of lithium-ion battery

A technology of lithium-ion batteries and carbon nanotubes, which is applied in electrical components, battery electrodes, secondary batteries, etc., can solve the problems such as the difficulty in increasing the specific capacity, and achieve improved electrochemical performance, low energy consumption, and technological conditions. Effect

Active Publication Date: 2015-12-09
SHANGHAI NAT ENG RES CENT FORNANOTECH
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific capacity of commercialized lithium-ion batteries and MH / Ni batteries has been difficult to continue to improve

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of carbon nanotube @ ternary @ silver composite material of lithium-ion battery
  • Preparation method of carbon nanotube @ ternary @ silver composite material of lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add lithium acetate, nickel acetate, cobalt acetate and manganese acetate into ethylene glycol at a molar ratio of 0.01mol:0.0033mol:0.0033mol:0.0033mol:0.0033mol and stir until the metal salts are completely dissolved; transfer the above ethylene glycol solution into a round bottom flask 0.1 g of CNTs containing functional groups was added, and a coaxial CNTM-alkylate precursor (M=Ni, Co, Mn) was formed by heating and refluxing at 170 °C for 5 h; Calcined at 800°C for 5h to form CNTLiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ;CNTLiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Add it to the diluted glucose solution and stir it magnetically to form a suspension, then add the diluted ammonia water dropwise to 0.001molAgNO 3 Ag(NH 3 ) 2 OH solution, the above suspension and Ag(NH 3 ) 2 OH solution mixed with magnetic stirring, heated at 60°C, centrifuged, washed and vacuum dried at 60°C to obtain CNTLiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Ag.

Embodiment 2

[0026] Add lithium nitrate, nickel nitrate, cobalt nitrate and manganese nitrate into ethylene glycol at a molar ratio of 0.01mol: 0.005mol: 0.003mol: 0.002mol and stir until the metal salts are completely dissolved; transfer the above ethylene glycol solution into a round bottom flask 0.15 g of CNTs containing functional groups were added, and the coaxial CNTM-alkylate precursor (M=Ni, Co, Mn) was formed by heating and refluxing at 170 °C for 5 h; Calcined at 850°C for 5h to form CNTLiNi 0.5 co 0.3 mn 0.2 o 2 ;CNTLiNi 0.5 co 0.3 mn 0.2 o 2 Add it to the diluted glucose solution and stir it magnetically to form a suspension, then add the diluted ammonia water dropwise to 0.001molAgNO 3 Ag(NH 3 ) 2 OH solution, the above suspension and Ag(NH 3 ) 2 OH solution mixed with magnetic stirring, heated at 60°C, centrifuged, washed and vacuum dried at 60°C to obtain CNTLiNi 0.5 co 0.3 mn 0.2 o 2 Ag. figure 2 is CNTLiNi 0.5 co 0.3 mn 0.2 o 2 The rate performance dia...

Embodiment 3

[0028]Add lithium acetate, nickel acetate, cobalt acetate and manganese acetate into glycerin at a molar ratio of 0.01mol: 0.008mol: 0.001mol: 0.001mol and stir until the metal salts are completely dissolved; transfer the above glycerol solution into a round bottom flask, and then add 0.2 g of CNTs containing functional groups were heated and refluxed at 220 °C for 5 h to form a coaxial CNTM-alkylate precursor (M=Ni, Co, Mn); 2 Calcined at 850°C for 5h to form CNTLiNi 0.8 co 0.1 mn 0.1 o 2 ;CNTLiNi 0.8 co 0.1 mn 0.1 o 2 Add it to the diluted maltose solution and stir it magnetically to form a suspension, then add the diluted ammonia water dropwise to 0.002molAgNO 3 Ag(NH 3 ) 2 OH solution, the above suspension and Ag(NH 3 ) 2 OH solution mixed with magnetic stirring, heated at 60°C, centrifuged, washed and vacuum dried at 60°C to obtain CNTLiNi 0.8 co 0.1 mn 0.1 o 2 Ag.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing a coaxial carbon nanotube @ ternary @ silver composite material (CNT@LiNi1-x-yCoxMnyO2@Ag) (both x,y are less than 1 and greater than 0) by a polyol two-step synthesis method and a centrifugal technique. CNT@LiNi1-x-yCoxMnyO2 (x is less than 1 and greater than 0, and y is less than 1 and greater than 0) can be formed on the carbon nanotube (CNT) surface through a polyol method; and the CNT@LiNi1-x-yCoxMnyO2@Ag (x is less than 1 and greater than 0, and y is less than 1 and greater than 0) can be formed through a silver mirror reaction. Through the structure, the electrochemical property of the material is greatly improved; the first specific discharge capacity at 1C magnification reaches 180mAh / g; the silver composite material has a relatively high theoretical capacity; through cycling for 50 times, the specific discharge capacity is 163mAh / g; the silver composite material has relatively stable cycles; the preparation method is simple; the technological conditions are easy to achieve; and the energy consumption is low.

Description

technical field [0001] The invention designs a method for preparing a battery electrode material, in particular a method for preparing a carbon nanotube ternary silver composite material for a lithium ion battery. Background technique [0002] With the rapid development of smaller, lighter and higher-performance electronic and communication devices, people have put forward higher and higher requirements on the performance of the batteries that power these devices, especially the specific energy. However, the specific capacity of currently commercialized lithium-ion batteries and MH / Ni batteries has been difficult to continue to increase. Therefore, there is an urgent need to develop batteries with higher specific energy. As a high specific energy chemical power source, lithium-ion secondary batteries have been widely used in mobile communications, notebook computers, video cameras, cameras, portable instruments and other fields, and have rapidly developed into one of the mo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/362H01M4/505H01M4/525H01M4/625H01M4/626H01M10/0525Y02E60/10
Inventor 何丹农吴晓燕杨扬张春明王丹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH