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Lithium anode for high-specific-energy secondary battery

A secondary battery and anode technology, applied in battery electrodes, fuel cell half-cells, primary battery half-cells, lithium batteries, etc., can solve the problem that lithium dendrites cannot achieve high cycle life and high safety at the same time, Low coulombic efficiency, short cycle life and other issues to achieve the effect of preventing polysulfide shuttle effect, overcoming easy cracking, and ensuring stability

Inactive Publication Date: 2016-10-12
SHENZHEN RES INST CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the existing lithium anodes for secondary batteries cannot achieve high cycle life and high safety while solving the growth of lithium dendrites, the present invention aims to provide a new lithium anode for secondary batteries with high specific energy. The lithium anode solves the problems of low Coulombic efficiency, short cycle life and poor safety while suppressing the growth of lithium dendrites on the electrode surface

Method used

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Embodiment 1

[0025] With copper as the conductive substrate, a layer of Ti is electrodeposited on the copper substrate, and then in 1%HF+0.5%NH 4 F+H 2 Formation of Cu-based TiO by anodic oxidation in O mixed solution 2 Nanotube array structure, Cu-based TiO 2 The nanopipe diameter size is about 10nm. Directional deposition of Li on Cu-based TiO by electrodeposition under inert atmosphere 2 In nanotubes, and coated with MOF metal organic framework barrier layer at the mouth of the tube, a high specific energy lithium anode (Cu / Li-TiO 2 / MOF).

Embodiment 2

[0027] CuZn alloy is a conductive substrate, and Fe grows on this conductive substrate 2 o 3 Nanotube array, the diameter of the nanotube is about 100nm, the Li is pressed into the base Fe by mechanical extrusion in the glove box 2 o 3 nanotubes, and coated with COF metal-organic framework barrier layer at the mouth of the tube, the directional growth / dissolution lithium anode (Cu / Li-Fe 2 o 3 / MOF).

Embodiment 3

[0029] Copper is used as the conductive substrate, and Al is grown on the copper substrate 2 o 3 Nanotube array, Cu-based Al 2 o 3 The nanotube diameter size is about 30nm. Directional deposition of Li on Cu-based Al by electrodeposition in a nitrogen atmosphere with an oxygen content below 5 ppm 2 o 3 nanotubes, and coated with LiClO 4 -PEO solid electrolyte material as a barrier layer to make directional growth / dissolution lithium anode (Cu / Li-TiO 2 / MOF).

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Abstract

The invention discloses a lithium anode for a high-specific-energy secondary battery. The lithium anode for the high-specific-energy secondary battery consists of a conductive substrate, a nanotube array, lithium metal and a barrier layer, wherein the nanotube array grows on the conductive substrate in an oriented manner; the lithium metal exists in the nanotube array; the barrier layer covers the nanotube structure. The lithium anode for the high-specific-energy secondary battery has the advantages that the lithium metal exists in a pipeline structure in a sealed manner, lithium dendrites can be prevented effectively, and a metal organic frame (MOF) which is rich in electrolyte or another lithium conducting material is used as the barrier layer, so that overgrowth of the lithium dendrites in local nanotubes can be prevented effectively, and the safety of the battery is ensured.

Description

technical field [0001] The invention belongs to the field of energy storage devices, in particular to the technical field of lithium metal anodes for high specific energy secondary batteries. Background technique [0002] Lithium (Li) is the smallest (atomic radius 0.76Å), lightest (density 0.53g / cm 3 ) and the metal element with the lowest potential (-3.040V vs. SHE), the secondary battery with metal Li as the anode has extremely high energy density, and is known as the "holy grail" of battery design and manufacturing. It appeared in the 1970s and 1980s There has been an upsurge in the research and development of metal lithium secondary batteries. However, the growth of lithium dendrites on metal Li anodes and the resulting short battery life and poor safety performance have seriously restricted the development of metal Li secondary batteries. Although Moli Energy Company has launched metal Li secondary battery products , but a fire accident in 1989 led to a standstill in...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/60H01M4/62H01M10/052H01M12/06B82Y30/00
CPCB82Y30/00H01M4/362H01M4/382H01M4/483H01M4/602H01M4/628H01M10/052H01M12/06Y02E60/10
Inventor 赖延清洪波刘晋张治安谢科予洪树张凯方静李劼
Owner SHENZHEN RES INST CENT SOUTH UNIV
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