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Copper-indium-gallium-selenium flexible thin film solar battery recycling method

A technology of solar cells and copper indium gallium selenide, applied in recycling technology, electronic waste recycling, waste treatment, etc., can solve the problems of complex composition of battery materials, complicated recycling process, and low recovery rate, and achieve easy large-scale promotion, The separation effect is obvious and the equipment requirements are not high.

Inactive Publication Date: 2015-11-18
常德东腾新能源有限公司
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Problems solved by technology

The ultimate goal of these methods is to separate and extract each valuable element. However, due to the complex composition of battery materials and various types of elements, copper indium gallium selenide is insoluble in ordinary acidic solutions, resulting in complex recovery processes, long steps, low recovery rates, and low cost. High and other problems, the application in industry is limited

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Embodiment Construction

[0023] The present invention is a method for recycling CIGS flexible thin-film solar cells. The main point is that the waste copper indium gallium selenide layer is reduced by hydrogen to obtain a copper indium gallium metal layer, which is returned to the CIGS production process to realize the recycling of raw materials. .

[0024] A copper indium gallium selenide (CIGS) flexible thin film solar cell recycling method of the present invention comprises the following steps:

[0025] (1) Unsealing treatment: CIGS thin-film battery is placed in the organic solvent of heating, dissolves the EVA encapsulation material of outer layer, and described organic solvent is ethyl acetate, acetone, toluene, xylene, methylene chloride, sherwood oil , liquid paraffin, and isododecane, one or more of which are selected and mixed when dissolving, and the heating temperature is 35°C to 85°C. Preferably 40°C to 70°C.

[0026] (2) One-time cleaning: clean the organic residual liquid on the batte...

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Abstract

A copper-indium-gallium-selenium flexible thin film solar battery recycling method comprises the steps: 1, packaging removal treatment; 2, primary cleaning; 3, acid dipping; 4, secondary cleaning; 5, a reduction reaction; and 6, a selenizing reaction. The method concretely comprises the following steps: removing an EVA outer packaging material, a TCO window layer and a CdS buffer layer through packaging removal and acid dipping, carrying out hydrogen reduction at a high temperature to reduce a copper-indium-gallium-selenium compound into a copper-indium-gallium metal layer, and returning the copper-indium-gallium metal layer to a selenizing annealing process as a precursor for producing a CIGS (copper-indium-gallium-selenium) thin film in order to afresh produce a CIGS battery. Compared with present CIGS thin film recycling methods, the method disclosed in the invention can effectively recover copper, indium and gallium, and has the advantages of simple process, low requirements on an apparatus, obvious separation effect, realization of raw material recycling, and easy large-scale popularization in production.

Description

technical field [0001] The invention relates to a method for recycling thin-film solar cells, in particular to a method for recycling copper indium gallium selenide (CIGS) flexible thin-film solar cells. Background technique [0002] Photovoltaic power generation is an efficient and clean energy utilization method in today's society. As of the end of 2014, the cumulative installed capacity of photovoltaic modules in the world reached 188.8GW, of which copper indium gallium selenium thin film solar cells accounted for more than 2GW, and the annual production capacity exceeded 2GW. Among various solar cells that have been commercialized, CIGS thin-film solar cells have gradually expanded their application fields due to their high theoretical efficiency, low material consumption, and low production energy consumption, especially thin-film cells prepared on flexible substrates. It has the advantages of curling and folding, good shock resistance, light weight and good low light ...

Claims

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Application Information

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IPC IPC(8): B09B5/00B09B3/00
CPCY02W30/20Y02W30/82
Inventor 赵联波胡潇文王宝玉
Owner 常德东腾新能源有限公司
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