EPA-109-XA08

109

2,820 千元

補助及獎勵回收清除處理暨再生利用

2020/02/01

2020/11/30

王復民

回收基管會

徐伊亭

國立臺灣科技大學

廢棄物管理

鋰離子電池、正極材料、劣化分析、修復合成、循環經濟

Lithium ion battery, Cathode material, Failure analysis, repair synthesis, Circular Economy

張仍奎

陳韋伶

02-27303755#

betty19931013@gmail.com

高鎳含量層狀材料是目前鋰離子電池商用品中最常被利用的正極，原因在於其高的電容量，因此在目前電動車以及電動化商品大量的推陳出新的時代，有效再回收利用這樣的高鎳含量層狀材料是本計畫的開發重點。本研究利用了日本松下株式會社所產製的電池為對象，對其進行老化/劣化分析，並同時針對電池性能、材料構造、電池內阻、粒子型態以及電化學等分析。電池的衰退除了人為不當使用以之外，最確切的原因即是因為電化學不可逆反應所造成的材料內部鋰離子數量減少。另外層狀結構也因為不可逆反應，結構毀損使得電池性能迅速衰退。本期計畫執行完畢之後，研究團隊將會使用水熱合成修復法來補足鋰離子數量，同時將層狀結構經由修復之後回復趨近至原始的狀態，使得鋰離子電池的循環經濟得以實現於目前大爆發的市場。根據研究結果，回收廢材料經水熱法修復後可以具有超過170 mAh/g的電容量，廢材回收率>80%以及廢材再製後電池的循環壽命為100 cycles > 60%。

鋰離子電池、正極材料、劣化分析、修復合成、循環經濟

EPA-109-XA08(期末報告).pdf

3MB

結案報告

2021/2/1 上午 12:00:00

The high nickel content layered material is currently the most commonly used positive electrode in lithium-ion battery commercial products. The reason is its high electrical capacity. Therefore, in the current era of large quantities of electric vehicles and electrified products, it is effectively recycled and reused. The high nickel content layered material is the development focus of this project. This research uses batteries produced by Panasonic Co., Ltd. as the object to conduct aging/deterioration analysis, and also analyzes battery performance, material structure, battery internal resistance, particle type, and electrochemistry. In addition to improper use of the battery, the most exact reason is the decrease in the amount of lithium ions inside the material caused by the irreversible electrochemical reaction. In addition, the layered structure is also due to irreversible reaction, structural damage makes the battery performance rapidly decline. After the implementation of this phase of the project, the research team will use the hydrothermal synthesis repair method to supplement the number of lithium ions, and at the same time restore the layered structure to the original state after repair, so that the circular economy of lithium-ion batteries can be realized. The current explosive market. According to the research results, the recycled waste materials can have an electric capacity of more than 170 mAh/g after hydrothermal repair, the waste material recovery rate is> 80%, and the cycle life of the battery after the waste material is 100 cycles> 60%.

Lithium ion battery, Cathode material, Failure analysis, repair synthesis, Circular Economy