以焙燒水浸法回收廢磷酸鐵鋰電池正極材料

Chaoyang University of Technology Institutional Repository > 理工學院 > 環境工程與管理系 > 博碩士論文 > Item 310901800/45158

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Title:	以焙燒水浸法回收廢磷酸鐵鋰電池正極材料 Recycling of Cathode Materials from Spent Lithium Iron Phosphate Batteries by Roasting and Water Leaching Method
Authors:	凃均叡 Tu, Jun-Rui
Contributors:	環境工程與管理系王文裕 Wang,Wen-Yu
Keywords:	鋰電池;磷酸鐵鋰;焙燒水浸 Lithium battery;Lithium iron phosphate;Roasting and Leaching
Date:	2025-08-31
Issue Date:	2025-10-23 16:04:01 (UTC+8)
Abstract:	根據美國地質調查局2024年報告，全球鋰產量從2022年的14萬6000噸成長為2023年的18萬噸，主要受鋰電池市場需求不斷增長，將近9成的碳酸鋰被應用在電池領域，尤其是使用在電動車上。全球大規模生產，電池製造商必須面對大量廢磷酸鐵鋰的回收問題，本研究利用焙燒水浸法浸出鋰元素，先將廢LFP正極粉末與添加劑按比例混合後調整焙燒溫度及時間，再以去離子水浸出鋰金屬，並調整pH以及設定水浸所需時間，待完成後以ICP-OES進行分析。試驗結果表明，硫酸銨為質量比1：0.8、焙燒溫度300℃、焙燒時間10分鐘、pH 2.5、水浸時間10分鐘，達到鋰浸出率97%，過硫酸銨最佳試驗參數為質量比1：0.6、焙燒溫度350℃、焙燒時間10分鐘、pH 2.5、水浸時間10分鐘，達到鋰浸出率96%。 According to the 2024 report by the United States Geological Survey, global lithium production increased from 146,000 tons in 2022 to 180,000 tons in 2023, primarily driven by the continuously growing demand from the lithium battery market. Nearly 90% of lithium carbonate is applied in the battery sector, especially in electric vehicles. With global large-scale production, battery manufacturers must address the substantial recycling challenges of waste lithium iron phosphate (LFP) batteries. This study utilizes a roasting-leaching method to extract lithium elements by first mixing waste LFP cathode powder with additives in specific proportions, then adjusting roasting temperature and time. Subsequently, lithium metal is leached using deionized water while adjusting pH values and setting the required leaching time. After completion, analysis is conducted using ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometry). Experimental results show that using ammonium sulfate at a mass ratio of 1:0.8, roasting at 300°C for 10 minutes, pH 2.5, and water leaching for 10 minutes achieves a lithium leaching rate of 97%. Using ammonium persulfate at a mass ratio of 1:0.6, roasting at 350°C for 10 minutes, pH 2.5, and water leaching for 10 minutes achieves a lithium leaching rate of 96%.
Appears in Collections:	[環境工程與管理系] 博碩士論文

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