Lithium ion energy storage device, and method and electrolytic tank apparatus for prefabricating lithium for negative electrode of lithium ion energy storage device

A technology of lithium ion and electrolytic cell, which is applied in the field of electrochemistry, can solve problems such as difficulty in metal lithium recovery and reuse, influence on the controllability of prefabricated lithium, and potential safety hazards, and achieve mature manufacturing processes, eliminate potential safety hazards, and avoid short circuits. Effect

Inactive Publication Date: 2017-07-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has inherent disadvantages: First, the production of metal lithium usually adopts high-temperature molten salt electrolysis method, which needs to be carried out under a protective atmosphere. The transportation and storage of metal lithium require strict protective measures and equipment requirements, so metal lithium itself is not energy-saving. Environmental friendly
Secondly, metal lithium is an excellent conductor of electrons, and it is easy to short circuit with the negative electrode in the process of prefabricating lithium, which poses a safety hazard.
Thirdly, metallic lithium has strong chemical activity, and can spontaneously react with prefabricated lithium electrolyte and electrolyte additives to form a passivation film, which affects the controllability of prefabricated lithium, and there are also difficulties in the recovery and reuse of metallic lithium.

Method used

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  • Lithium ion energy storage device, and method and electrolytic tank apparatus for prefabricating lithium for negative electrode of lithium ion energy storage device
  • Lithium ion energy storage device, and method and electrolytic tank apparatus for prefabricating lithium for negative electrode of lithium ion energy storage device
  • Lithium ion energy storage device, and method and electrolytic tank apparatus for prefabricating lithium for negative electrode of lithium ion energy storage device

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Effect test

Embodiment 1

[0039] For prefabricating lithium for the silicon-based lithium battery negative electrode material, first the electrolytic cell device according to the present invention is figure 1 Assemble. First, the cathode of the electrolytic cell was assembled in an argon-filled glove box, and the gel electrolyte used was 1M LiPF with an infiltration volume ratio of 3:7. 6 PVDF / PMMA / PVDF in EC / DEC organic electrolyte is placed in a stainless steel nut and attached to a ceramic-based solid electrolyte film. The ceramic-based solid electrolyte film used is Li 2 O-Al 2 o 3 -SiO 2 -P 2 o 5 -TiO 2 -GeO 2 Glass-ceramic membrane. Paste the silicon-based negative electrode on the gel electrolyte, and tighten the stainless steel bolts. The electrolytic cell cathode is then assembled with the glass anode and sealed with a second rubber ring. Place the Ag / AgCl reference electrode and the titanium rod wound with copper wire on the glass anode, pour 0.5MLi into the glass anode 2 SO 4 aqu...

Embodiment 2

[0041] For prefabricating lithium for the negative electrode material of silicon-based lithium battery, the device is first figure 1 Assemble. First, the cathode of the electrolytic cell was assembled in an argon-filled glove box, and the gel electrolyte used was 1M LiPF impregnated in a volume ratio of 3:7. 6 PVDF / PMMA / PVDF in EC / DEC organic electrolyte is placed in a stainless steel nut and attached to a ceramic-based solid electrolyte film. The ceramic-based solid electrolyte film used is Li 2 O-Al 2 o 3 -SiO 2 -P 2 o 5 -TiO 2 -GeO 2 Glass-ceramic membrane. Paste the silicon-based negative electrode on the gel electrolyte, and tighten the stainless steel bolts. The electrolytic cell cathode is then assembled with the glass anode and sealed with a second rubber ring. Place the Ag / AgCl reference electrode and the titanium rod wound with copper wire on the glass anode, pour 0.5MLi into the glass anode 2 SO 4 aqueous solution, and through the argon, the device is as...

Embodiment 3

[0043] For prefabricating lithium for the negative electrode material of manganese oxide-based lithium battery, firstly, the device is figure 1 Assemble. First, the cathode of the electrolytic cell was assembled in an argon-filled glove box, and the gel electrolyte used was 1M LiPF soaked in a volume ratio of 3:7 6

[0044] The PVDF / PMMA / PVDF in the EC / DEC organic electrolyte is placed in a stainless steel nut and attached to a ceramic-based solid electrolyte film. The ceramic-based solid electrolyte film used is Li 2 O-Al 2 o 3 -SiO 2 -P 2 o 5 -TiO 2 -GeO 2 Glass-ceramic membrane. Paste the manganese oxide-based negative electrode on the gel electrolyte, and tighten the stainless steel bolts. The cathode of the electrolytic cell is then assembled with the glass anode and sealed with a rubber ring. Place the Ag / AgCl reference electrode and the titanium rod wound with copper wire on the glass anode, pour 0.5MLi into the glass anode 2 SO 4 aqueous solution, and thro...

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Abstract

The invention discloses a lithium ion energy storage device, and a method and an electrolytic tank apparatus for prefabricating lithium for a negative electrode of the lithium ion energy storage device. By adopting a lithium ion semi-battery type design, a gel polymer electrolyte is attached between a lithium battery negative electrode material and a ceramic-based solid-state electrolyte thin film in a coating manner, so as to provide high ionic conduction; after lithium prefabricating is performed, the gel polymer electrolyte and a lithium battery negative electrode can be loaded into a complete battery together to manufacture a polymer lithium battery; in addition, a positive electrode of the electrolytic tank adopts a lithium ion water solution as an electrolyte and a lithium source; the lithium source is wide in raw materials which can be lithium brine or waste lithium battery lithium recycling water solution; and therefore, the obtained lithium ion energy storage device is environment friendly, free of toxicity, stable in chemical property, free of strict storage and transportation equipment, and capable of lowering cost of lithium prefabricating.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and relates to a method for prefabricating lithium as a negative electrode of a lithium ion energy storage device without using metallic lithium, an electrolytic cell device, and a lithium ion energy storage device composed of the negative electrode after the lithium is prefabricated. Background technique [0002] Lithium-ion energy storage devices include lithium-ion batteries and lithium-ion capacitors, which have the advantages of high energy density, small self-discharge, long cycle life, and no memory effect. They are widely used in portable electronic devices, energy storage communications, aerospace, Electric vehicles, wind energy storage and other fields. With the development of lithium-ion capacitors and large-capacity sulfur-based, air (oxygen)-based and metal oxide-based lithium-ion batteries, lithium-ion battery negative electrode prefabricated lithium has become a very important resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058H01G11/50
CPCH01G11/50H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 周海涛高宏权袁晓晨杨建红
Owner JIANGSU UNIV
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