Beneficial effects of 1-propylphosphonic acid cyclic anhydride as an electrolyte additive on the electrochemical properties of LiNi0.5Mn1.5O4 cathode material

• Published in: Journal of power sources Vol. 263; pp. 231 - 238
• Main Authors: Yan, Guochun, Li, Xinhai, Wang, Zhixing, Guo, Huajun, Xiong, Xunhui
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2014; Elsevier
• Subjects: 1-Propylphosphonic acid cyclic anhydride; Additive; Applied sciences; Electrical engineering. Electrical power engineering; Electrochemical properties; Exact sciences and technology; Materials; Spinel lithium–nickel–manganese oxide; Additive; Electrochemical properties; 1-Propylphosphonic acid cyclic anhydride; Spinel lithium–nickel–manganese oxide; Cathode; Nickel Oxides; Lithium Oxides; Transition metal; Organic anhydride; Electrode material; Quaternary compound; Electrolyte; Spinels; Manganese Oxides; Spinel lithium―nickel―manganese oxide; Nickel; Lithium oxide; Nickel oxide
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2014.04.060

Self-discharge and transition metal dissolution weaknesses bother the application of LiNi0.5Mn1.5O4 cathode material due to the severe oxidation of electrolyte at the high voltage state. A novel additive, 1-propylphosphonic acid cyclic anhydride (PACA), is desirable to prevent this oxidation. CV and charge–discharge results reveal that adding 0.5% PACA can relieve the oxidation of electrolyte. Consequently, the self-discharge and transition metal dissolution are both suppressed effectively, which is validated by self-discharge tests, XPS, and EDX analyses. Moreover, using PACA as an additive enhances the capacity retention capability of LiNi0.5Mn1.5O4 at elevated temperatures significantly. •1-Propylphosphonic acid cyclic anhydride (PACA) is investigated as an additive.•Self-discharge of LiNi0.5Mn1.5O4 is effectively suppressed by adding PACA into electrolyte.•Enhanced cycling performance of LiNi0.5Mn1.5O4 at elevated temperatures is achieved.•Reduced transition metal dissolution of LiNi0.5Mn1.5O4 by using PACA.