廢單晶矽太陽能電池中矽資源回收之研究

Silicon Resource Recovery of Spent Monocrystalline Silicon Solar Batteries

李清華(Ching-Hwa Lee) ； 洪基恩(Chi-En Hung) ； 蔡尚林(Shang-Lin Tsai) ； 廖靖華(Ching-Hua Liao)

《科學與工程技術期刊》 8卷3期 (2012/09) Pp. 9-13

https://doi.org/10.7117/JSET.201209.0009

摘要

全球太陽能電池日益普及，因此於製程中衍生之廢棄太陽能電池數量亦逐年增加，廢矽晶類太陽能電池之主要成分為矽、銀、鋁，由於這些有價資源值得進一步回收，於是本研究將利用研磨篩分，浸漬溶蝕等方法來回收廢單晶矽太陽能電池中矽、銀、鋁有價資源金屬。根據本研究成果所示，廢太陽能電池中之鋁可以硫酸予以100%去除，另於上述條件完成後，再將含矽、銀殘渣以硝酸予以100%去除溶銀金屬，因此經硫酸與硝酸溶蝕後僅剩矽有價資源。

關鍵字

廢單晶矽 ； 太陽能電池 ； 矽 ； 銀 ； 鋁 ； 回收

並列摘要

As solar batteries become increasingly popular worldwide, increasing numbers are manufactureed annually, leading to the accumulation of spent batteries. The chief element of spent silicon solar batteries is silicon, which is a valuable resource worth recovering. In addition to silicon, these batteries contains small amounts of silver and aluminum. This study uses techniques such as grinding, screening and leaching to remove the impurities of silver and aluminum from these batteries to obtain a high-purity of silicon. In this study, 100% of the aluminum impurities were removed by sulfuric acid, and 100% of the silver impurities were removed by nitric acid. Following removal in sulfuric acid and nitric acid, a high purity of silicon was achieved.

並列關鍵字

spent monocrystalline ； solar battery ； silicon ； silver ； aluminum ； recycle