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CNFs-loaded MoS2 novel magnesium-lithium double-salt battery positive electrode material and construction method thereof

A battery cathode, a new type of technology, applied in battery electrodes, secondary batteries, nanotechnology for materials and surface science, etc., can solve structural instability, reduce battery system capacity, rate characteristics and cycle stability, restrict lithium Problems such as rapid saturation intercalation/deintercalation of ions

Active Publication Date: 2019-08-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the lithium-intercalation cathode materials used in lithium-ion batteries and dual-salt batteries have single components, simple structure, insufficient conductivity, low activity, unstable structure, and lack of channels for rapid ion extraction, which seriously restrict the lithium-ion battery. Rapid saturation insertion / extraction reduces the capacity, rate characteristics and cycle stability of the battery system

Method used

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  • CNFs-loaded MoS2 novel magnesium-lithium double-salt battery positive electrode material and construction method thereof
  • CNFs-loaded MoS2 novel magnesium-lithium double-salt battery positive electrode material and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Step 1, carbon fiber pretreatment: cut a bunch of carbon fiber CNFs with scissors to 5-10mm, disperse and soak in acetone solution, remove oil and other impurities on the surface of CNFs, and improve the surface cleanliness and activity of CNFs;

[0031] Step 2, solution preparation: Weigh 0.80g of sodium molybdate, 0.68g of hydroxylamine hydrochloride and 1.20g of thiourea and dissolve them in 50mL of deionized water;

[0032] Step 3, surfactant addition and pH adjustment: then weigh 0.18g of cetyltrimethylammonium bromide (CTAB) and add it to the solution, adjust the pH of the solution to 6 with 2mol / L of HCL to obtain a solution ;

[0033] Step 4, hydrothermal synthesis: Add the carbon fiber CNFs obtained in step 1 to the solution obtained in step 3 to obtain a hydrothermal solution, stir the above hydrothermal solution for 1 hour, transfer it to a 100mL hydrothermal reaction kettle, and react The kettle was placed in an oven and reacted at 180°C for 24h.

[0034] ...

Embodiment 2

[0036] Step 1, carbon fiber pretreatment: cut a bunch of carbon fiber CNFs with scissors to 5-10mm, disperse and soak in acetone solution, remove oil and other impurities on the surface of CNFs, and improve the surface cleanliness and activity of CNFs;

[0037] Step 2, solution preparation: Weigh 0.68g of sodium molybdate, 0.525g of hydroxylamine hydrochloride and 1.0g of thiourea and dissolve them in 50mL of deionized water;

[0038]Step 3, surfactant addition and pH adjustment: then weigh 0.18g of cetyltrimethylammonium bromide (CTAB) and add it to the solution, adjust the pH of the solution to 6 with 2mol / L of HCL to obtain a solution ;

[0039] Step 4, hydrothermal synthesis: Add the carbon fiber CNFs obtained in step 1 to the solution obtained in step 3 to obtain a hydrothermal solution, stir the above hydrothermal solution for 1 hour, transfer it to a 100mL hydrothermal reaction kettle, and react The kettle was placed in an oven and reacted at 180°C for 24h.

[0040] S...

Embodiment 3

[0042] Example 1

[0043] Step 1, carbon fiber pretreatment: cut a bunch of carbon fiber CNFs with scissors to 5-10mm, disperse and soak in acetone solution, remove oil and other impurities on the surface of CNFs, and improve the surface cleanliness and activity of CNFs;

[0044] Step 2, solution preparation: Weigh 0.88g of sodium molybdate, 0.825g of hydroxylamine hydrochloride and 1.60g of thiourea and dissolve them in 50mL of deionized water;

[0045] Step 3, surfactant addition and pH adjustment: then weigh 0.18g of cetyltrimethylammonium bromide (CTAB) and add it to the solution, adjust the pH of the solution to 6 with 2mol / L of HCL to obtain a solution ;

[0046] Step 4, hydrothermal synthesis: Add the carbon fiber CNFs obtained in step 1 to the solution obtained in step 3 to obtain a hydrothermal solution, stir the above hydrothermal solution for 1 hour, transfer it to a 100mL hydrothermal reaction kettle, and react The kettle was placed in an oven and reacted at 180°...

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Abstract

The invention discloses a CNFs-loaded MoS2 novel magnesium-lithium double-salt battery positive electrode material and a construction method thereof. The CNFs account for x which is equal to 20-40wt%,and an MoS2 flower-shaped nano material accounts for 60-80wt%. The construction method comprises the steps: carbon fiber pretreatment, solution preparation, surfactant addition, PH value adjustment,hydrothermal synthesis and product collection; and finally, the one-step hydro-thermal synthesis of a final product is performed to generate a CNTs in-situ loaded MoS2 nano-composite material CNFs@MoS2. According to the invention, the capacity and the rate capability of the double-salt battery are improved, so that the cycle stability of a magnesium-lithium double-salt battery is improved, and theservice life of the battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of secondary power battery materials, in particular to a CNFs loaded MoS 2 A novel magnesium-lithium double-salt battery cathode material and its construction method. Background technique [0002] The development and utilization of energy is accompanied by human development and social progress. Energy is a necessity in daily life and "drives" human life and social progress. Rapid population growth and rapid expansion of heavy industry lead to rising energy demand, and environmental problems caused by massive consumption of fossil energy are gradually emerging. However, traditional fossil energy is non-renewable and has been over-exploited, forcing the world to fall into the dilemma of fossil energy depletion and environmental pollution. It is imminent to develop and utilize clean and efficient renewable energy sustainable energy and upgrade the current energy system. Human beings always spare no effort to ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01M10/054B82Y30/00B82Y40/00
CPCH01M4/366H01M4/5815H01M4/625H01M4/628H01M10/0525H01M10/054B82Y30/00B82Y40/00Y02E60/10
Inventor 侯小江杨艳玲石洪昌潘俊王祎冯雷张荔锁国权叶晓慧朱建锋
Owner SHAANXI UNIV OF SCI & TECH
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