MoS2@EG magnesium-lithium double-salt ion battery positive electrode material and construction method thereof

A battery positive electrode and positive electrode material technology, applied in the direction of battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of single composition, insufficient conductivity, and unstable structure of lithium-intercalated positive electrode materials, and achieve improved charging and discharging kinetics and capacity, good charge-discharge cycle stability, and improved structural stability

Inactive Publication Date: 2019-10-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • MoS2@EG magnesium-lithium double-salt ion battery positive electrode material and construction method thereof
  • MoS2@EG magnesium-lithium double-salt ion battery positive electrode material and construction method thereof

Examples

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Effect test

Embodiment 1

[0050] A(x)MoS 2 @EG magnesium-lithium double salt ion battery cathode material, for EG in-situ loading MoS 2 Nanoflower-like composites; (x)MoS 2 In @EG nanocomposites, EG accounts for x=5~20wt.%, MoS 2 The flower-like nanomaterial accounts for 80-95wt.%.

[0051] In this embodiment x=5wt.%.

[0052] The present invention also proposes a MoS 2 The synthesis method of @EG magnesium-lithium double salt ion battery cathode material, including, the specific process is:

[0053] S1, EG pretreatment

[0054] Disperse EG into acetone solution and soak to remove oil and other impurities on the surface of EG, and improve the surface activity and affinity of EG;

[0055] S2, solution preparation

[0056] Weigh 0.6g sodium molybdate, 0.55g hydroxylamine hydrochloride and 1.0g thiourea respectively and dissolve in 40mL deionized water;

[0057] S3, surfactant addition and pH value adjustment

[0058] Then take by weighing 0.15g cetyltrimethylammonium bromide (CTAB) and join in t...

Embodiment 2

[0064] A(x)MoS 2 @EG magnesium-lithium double salt ion battery cathode material, for EG in-situ loading MoS 2 Nanoflower-like composites; (x)MoS 2 In @EG nanocomposites, EG accounts for x=5~20wt.%, MoS 2 The flower-like nanomaterial accounts for 80-95wt.%.

[0065] In this embodiment x=10wt.%.

[0066] The present invention also proposes a MoS 2 The synthesis method of @EG magnesium-lithium double salt ion battery cathode material, including, the specific process is:

[0067] S1, EG pretreatment

[0068] Disperse EG into acetone solution and soak to remove oil and other impurities on the surface of EG, and improve the surface activity and affinity of EG;

[0069] S2, solution preparation

[0070] Weigh 0.8g sodium molybdate, 0.75g hydroxylamine hydrochloride and 1.4g thiourea respectively and dissolve in 60mL deionized water;

[0071] S3, surfactant addition and pH value adjustment

[0072] Then take by weighing 0.17g cetyltrimethylammonium bromide (CTAB) and join in ...

Embodiment 3

[0078] A(x)MoS 2 @EG magnesium-lithium double salt ion battery cathode material, for EG in-situ loading MoS 2 Nanoflower-like composites; (x)MoS 2 In @EG nanocomposites, EG accounts for x=5~20wt.%, MoS 2 The flower-like nanomaterial accounts for 80-95wt.%.

[0079] In this embodiment x=20wt.%.

[0080] The present invention also proposes a MoS 2 The synthesis method of @EG magnesium-lithium double-salt ion battery cathode material, the specific process is as follows:

[0081] S1, EG pretreatment

[0082] Disperse EG into acetone solution and soak to remove oil and other impurities on the surface of EG, and improve the surface activity and affinity of EG;

[0083] S2, solution preparation

[0084] Weigh 1.0g of sodium molybdate, 0.95g of hydroxylamine hydrochloride and 1.8g of thiourea and dissolve them in 80mL of deionized water;

[0085] S3, surfactant addition and pH value adjustment

[0086] Then take by weighing 0.20g cetyltrimethylammonium bromide (CTAB) and join...

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Abstract

The invention discloses a MoSe2@EG magnesium-lithium double-salt ion battery positive electrode material and a construction method thereof. a layer of high-activity nanoflower-like two-dimensional nanomaterial MoS2 is loaded in situ on the surface of EG with good conductivity by one-step hydrothermal method, efficient saturated intercalation and de-intercalation of Li+ in the positive electrode material can be effectively promoted with the help of the high conductivity of EG and the high activity and layered structure characteristics of MoS2, and the capacity and rate characteristic of double-salt batteries are improved. In addition, MoSe2@EG can effectively alleviate a problem of material pulverization caused by volume expansion and contraction of the positive electrode material due to the intercalation and de-intercalation of Li+, thereby improving the cycle stability of the magnesium-lithium double-salt ion batteries, and prolonging the battery life.

Description

technical field [0001] The invention belongs to the technical field of secondary power battery materials, and specifically relates to a MoS 2 @EGMagnesium-lithium double-salt ion 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. In addition, 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 sustainable energy using clean and efficient renewable energy and upgrade the current energy system. Human beings always spare no effort to expl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/5815H01M4/625H01M4/628H01M10/0525H01M10/054H01M2004/021H01M2004/028Y02E60/10
Inventor 侯小江常天骄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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