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Lead-manganese secondary battery

A secondary battery and electronic technology, applied in the direction of semi-lead batteries, etc., can solve the problems of inability to meet fast energy storage, low cycle life, etc., and achieve the effects of high power density, stable cycle life, and high cycle life

Active Publication Date: 2018-08-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lead-acid batteries are polluting, reducing or eliminating the use of lead has become an urgent problem
On the other hand, the fast charging process of lead-acid batteries is affected by the PbSO 4 / PbO 2 Influenced by the slew rate, it cannot meet the needs of fast energy storage
In addition, the cycle life of traditional lead-acid batteries is still far below the needs of large-scale energy storage

Method used

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Examples

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Effect test

Embodiment 1

[0018] Example 1: Novel lead-manganese battery, positive electrode: carbon felt material deposited with manganese dioxide, negative electrode: lead grid plate filled with spongy lead, electrolyte: 2M sulfuric acid.

[0019] In this example, the positive current collector adopts carbon felt deposited with manganese dioxide, and the electrolyte is 2 mol / L sulfuric acid solution. The separator is a non-woven fabric, which only serves to prevent short-circuiting of the positive and negative electrodes. 10mA / cm 2 Discharge to 0.6V at current density, charge to 9 mAh at a constant voltage of 1.6 V (1 mAh / cm 2 ), the Coulombic efficiency reached 100% after 90 cycles. at 30 mA / cm 2 In the case of discharge, the Coulombic efficiency reaches 99%, and it can stably cycle 15,000 times.

Embodiment 2

[0020] Example 2: Novel lead-manganese battery, positive electrode: carbon paper deposited with manganese dioxide, negative electrode: lead grid filled with spongy lead, electrolyte: 2M sulfuric acid.

[0021] In this example, the positive current collector is carbon paper deposited with manganese dioxide, and the electrolyte is 2 mol / L manganese sulfate solution. The separator is a non-woven fabric, which only serves to prevent short-circuiting of the positive and negative electrodes. 10mA / cm 2 Discharge to 0.6V at current density, charge to 9 mAh at a constant voltage of 1.6 V (1 mAh / cm 2 ), the Coulombic efficiency reached 100% after 60 cycles. at 30 mA / cm 2 In the case of discharge, the Coulombic efficiency reaches 97%, and it can be stably cycled for 10,000 times.

Embodiment 3

[0022] Example 3: Novel lead-manganese battery, positive electrode: conductive graphite plate deposited with manganese dioxide, negative electrode: lead grid plate filled with spongy lead, electrolyte: 2M sulfuric acid + 1M MnSO 4 solution.

[0023] In this example, the positive current collector uses a conductive graphite plate deposited with manganese dioxide, and the electrolyte is 2 mol / L sulfuric acid + 1M MnSO 4 solution. The separator is a non-woven fabric, which only serves to prevent short-circuiting of the positive and negative electrodes. 10mA / cm 2 Discharge to 0.6V at current density, charge to 9 mAh at a constant voltage of 1.6 V (1 mAh / cm 2), the Coulombic efficiency reached 100% after 50 cycles. at 30mA / cm 2 In the case of discharge, the Coulombic efficiency reaches 98%, and it can stably cycle 12,000 times.

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Abstract

The invention belongs to the technical field of electrochemistry and in particular relates to a lead-manganese secondary battery. The secondary battery comprises a negative electrode taking lead as anactive substance, a positive electrode taking manganese dioxide as an active substance, sulfuric acid solution electrolyte and a porous diaphragm. According to the lead-manganese secondary battery, based on dissolving and deposition reaction of the electrode active substances, the reaction speed of positive electrode reaction is not controlled by dispersion of ions in an electrode crystal structure and ultrahigh power density is realized; negative electrode reaction is stable and reliable lead / lead sulfate conversion reaction and a dendritic crystal problem is not caused; the battery has high-stability cycling life. Compared with a commercialized lead acid battery system, one half of dosage of the lead of a battery system is reduced and a semi-lead battery can be obtained; the rapid charging / discharging performance and the cycling life are better than that of an existing lead acid battery system, so that the market of existing lead acid batteries can be replaced.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a lead-manganese secondary battery. Background technique [0002] Since the 21st century, the world's increasing energy demand has made the world's crude oil supply increasingly tight, and the environmental problems caused by the use of fossil fuels, such as global warming and increasingly serious smog weather, have also attracted more and more attention. Countries around the world now clearly point out that they should accelerate the increase in the proportion of renewable energy such as hydropower, wind energy, solar energy, and biomass energy, and must focus on making breakthroughs in the development and utilization of renewable energy, especially new energy grid-connected technology and energy storage technology. However, due to the intermittent nature of renewable energy (such as wind energy, solar energy, and tidal energy, etc.), its discontinuous and unstable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/20
CPCH01M10/20Y02E60/10
Inventor 王永刚夏永姚黄健航
Owner FUDAN UNIV
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