Application of metal material and zinc-based battery taking metal material as negative electrode

A metal material, zinc-based battery technology, applied in negative electrodes, battery electrodes, secondary batteries, etc., can solve problems such as uneven zinc deposition, dendrite fracture capacity, and easy dendrite formation, so as to improve Coulombic efficiency and accelerate Effect of nucleation and battery life extension

Pending Publication Date: 2021-01-01
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with the currently widely used lithium-ion batteries, zinc-based batteries have higher energy density and safety. However, during the charging and discharging process, because the surface of the negative electrode is not completely uniform, the reactivity of different parts is different, and the deposition of zinc is uneven. Formation of dendrites, on the one hand, the dendrites will pierce the separator, resulting in a short circuit of the battery, on the other hand, the dendrite fracture during the discharge process will cause irreversible capacity loss

Method used

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  • Application of metal material and zinc-based battery taking metal material as negative electrode
  • Application of metal material and zinc-based battery taking metal material as negative electrode
  • Application of metal material and zinc-based battery taking metal material as negative electrode

Examples

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Effect test

Embodiment 1

[0021] Using a tin sheet as the negative electrode, K 2 NiFe(CN) 6 As positive electrode, glass fiber as separator, 1mol / L Zn(TFSI) 2 And 20M LiTFSI mixed solution as electrolyte, assemble battery. Charge and discharge current density is 1mA / cm 2 , The charge and discharge voltage range is 0.8 ~ 2.0V. Battery cycle performance such as image 3 As shown, the specific capacity of the battery is about 85mAh / g, the Coulombic efficiency is 99.8%, and it can be cycled stably for more than 500 times.

Embodiment 2

[0023] Using a copper sheet as the negative electrode, K 2 NiFe(CN) 6 As the positive electrode, glass fiber as the separator, 0.5mol / L K 2 SO 4 and 0.5mol / L ZnSO 4 The mixed solution is used as an electrolyte to assemble a battery. Charge and discharge current density is 1mA / cm 2 , The charge and discharge voltage range is 0.8 ~ 2.0V. Battery cycle performance such as Figure 4 As shown, the specific capacity of the battery is about 65mAh / g, the Coulombic efficiency is 99.5%, and it can be cycled stably for more than 500 times.

[0024] In summary, the present invention provides a use of a metal material and a zinc-based battery using the metal as a negative electrode, utilizing the characteristics that silver, iron, nickel, titanium, copper, tin, aluminum and other metals can form solid solutions with zinc, Using one or more of these metals as the negative electrode of the zinc-based battery can effectively suppress the problem of dendrite growth in the zinc-based bat...

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Abstract

The invention discloses an application of a metal material and a zinc-based battery using the metal material as a negative electrode, the metal material is used as the negative electrode of the zinc-based battery, and the metal material is a metal capable of forming a solid solution with zinc. The metal material is an alloy composed of any one or more of silver, iron, nickel, titanium, copper, tinand aluminum. Preferably, the metal material is copper or tin. The metal material disclosed by the invention can form a solid solution with zinc, reduce the nucleation overpotential of zinc deposition and accelerate zinc nucleation, so that the nucleation rate is greater than the growth rate, thereby inhibiting dendritic crystal growth, obtaining a uniform and flat deposition layer, prolonging the service life of a battery and improving the coulombic efficiency of the battery.

Description

technical field [0001] The invention belongs to the technical field of new energy, and relates to the use of a metal material and a zinc-based battery using the metal as a negative electrode. Background technique [0002] With the excessive exploitation and combustion of fossil energy, the energy crisis and environmental problems continue to intensify. The development and utilization of renewable energy has become the focus of social development. However, renewable energy such as solar energy and wind energy is unstable and cannot be directly integrated into the grid. Therefore, Energy storage technology has become the key to the utilization of renewable energy, and zinc-based batteries are one of them. [0003] Compared with the currently widely used lithium-ion batteries, zinc-based batteries have higher energy density and safety. However, during the charging and discharging process, because the surface of the negative electrode is not completely uniform, the reactivity of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/42H01M10/36
CPCH01M4/42H01M4/628H01M10/36H01M2004/027Y02E60/10
Inventor 梁宵彭鹏李祝欣髙禄杰邵宇鹰顾天马鲁
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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