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High-voltage battery containing aqueous electrolyte

A water-based electrolyte and high-voltage technology, which is applied to secondary batteries, battery pack components, circuits, etc., can solve the problems of high price, battery safety, and high working voltage of lithium-ion batteries, achieving cost-effective results

Inactive Publication Date: 2015-12-09
周飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-ion batteries have a high working voltage but are expensive. Due to the use of organic solvents as electrolytes, there are also potential safety hazards in the use of batteries

Method used

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  • High-voltage battery containing aqueous electrolyte
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  • High-voltage battery containing aqueous electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Negative electrode: Zn;

[0007] Negative electrode electrolyte: 4mol / LNaOH and 0.5mol / LNa 2 SO 4 mixture;

[0008] Positive electrode: MnO 2 :superPLi:PVDF=90:5:5;

[0009] Positive electrode production method: mix manganese dioxide, conductive agent (superPLi), and binder (PVDF) according to the mass ratio of 90:5:5, and then use a suitable solvent to make slurry, stir evenly and apply it on a specific current collector Just dry;

[0010] Positive electrode electrolyte: 1mol / LH 2 SO 4 and 0.5mol / LNa 2 SO 4 mixture;

[0011] Diaphragm: Nafion—Na + (sodium ion exchange membrane).

[0012] Battery at 123.2mA / g MnO2 Discharge to 1.1V under the current density, the discharge medium voltage is 2.52V, and the capacity reaches 500mAh / g MnO2 . See the attached discharge curve figure 1 .

Embodiment 2

[0014] Negative electrode: Zn;

[0015] Negative electrode electrolyte: 8mol / L ammonia water and 0.5mol / LNa 2 SO 4 mixture;

[0016] Positive electrode: MnO 2 :superPLi:PVDF=90:5:5;

[0017] Positive electrode production method: mix manganese dioxide, conductive agent (superPLi), and binder (PVDF) according to the mass ratio of 90:5:5, and then use a suitable solvent to make slurry, stir evenly and apply it on a specific current collector Just dry;

[0018] Positive electrode electrolyte: 1mol / LH 2 SO 4 and 0.5mol / LNa 2 SO 4 mixture;

[0019] Diaphragm: Nafion—Na + (sodium ion exchange membrane).

[0020] Battery at 246.4mA / g MnO2 Discharge to 1.1V under current density, discharge medium voltage is 2.32V, capacity reaches 462mAh / g MnO2 . See the attached discharge curve figure 2 .

Embodiment 3

[0022] Negative electrode: Mg;

[0023] Negative electrolyte: V(DMSO):V(EtOH)=1:3 saturated NH 4 Cl solution;

[0024] Positive electrode: MnO 2 :superPLi:PVDF=90:5:5;

[0025] Positive electrode production method: mix manganese dioxide, conductive agent (superPLi), and binder (PVDF) according to the mass ratio of 90:5:5, and then use a suitable solvent to make slurry, stir evenly and apply it on a specific current collector Just dry;

[0026] Positive electrode electrolyte: 1mol / LH 2 SO 4 and 0.5mol / LNa 2 SO 4 mixture

[0027] Diaphragm: Nafion—Na + (sodium ion exchange membrane).

[0028] Battery at 60mA / g MnO2 The discharge curve under the current density is shown in the appendix image 3 .

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Abstract

The invention discloses a high-voltage battery containing an aqueous electrolyte and a preparation method of the high-voltage battery. The battery uses an appropriate diaphragm to lead positive reaction and negative reaction to generate in different environments, so that the positive reaction has low reduction potential, the negative reaction has high oxidation potential, and the battery has high working voltage. The battery mainly comprises a positive electrode, a negative electrode, a positive electrolyte, a negative electrolyte and the diaphragm. By reasonably selecting the positive electrode, the negative electrode, the diaphragm and the electrolytes corresponding to the positive electrode and the negative electrode, the battery having the working voltage higher than 2.0V can be obtained.

Description

technical field [0001] The invention relates to a battery and a manufacturing method thereof, in particular to a high-voltage battery containing an aqueous electrolyte and a manufacturing method thereof. Background technique [0002] With the advent of the electronic age, people's demand for chemical power sources is increasing, and their performance requirements are also increasing. At present, the operating voltage of batteries using aqueous solutions as electrolytes is almost below 2.0V, while most batteries using organic solutions as electrolytes have potential safety hazards. Ordinary carbon-zinc batteries not only have low working voltage but also low energy density. Alkaline zinc-manganese batteries have relatively good electrochemical performance and high cost performance, but their working voltage is generally lower than 1.5V. Lithium-ion batteries have a high working voltage but are expensive. Due to the use of organic solvents as electrolytes, there are also pote...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M10/38H01M2/16H01M50/40
CPCH01M10/36H01M10/38H01M50/411Y02E60/10Y02P70/50
Inventor 周飞
Owner 周飞
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