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LIU, J., LI, X., WANG, Z., GUO, H., PENG, W., ZHANG, Y., & HU, Q. (2010). Preparation and characterization of lithium hexafluorophosphate for lithium-ion battery electrolyte. Transactions of Nonferrous Metals Society of China, 20(2), 344–348. doi:10.1016/s1003-6326(09)60144-8 
10.1016/S1003-6326(09)60144-8