Thermal stability of propylene carbonate and ethylene carbonate–propylene carbonate-based electrolytes for use in Li cells

Thermal instability of Olivine-type LiMnPO4 cathodes

“…3a. The total amount of heat generated was 280 J g −1 , comparable to the value reported by Katayama et al [14]. The peak position, however, is about 30 • C higher in our DSC profile, which could be due to improved sealing of our DSC pans.…”

Effects of solvents and salt on the thermal stability of lithiated graphite used in lithium ion battery

“…Up to now, researchers have used differential scanning calorimetry (DSC) [3,[13][14][15][16][17], thermal gravimetric analysis (TGA) [18][19][20] and accelerating rate calorimetry (ARC) [16,[21][22][23][24][25][26][27] to analyze the stabilities of various components of lithium ion cell. Graphite as one major anodes used in lithium ion battery also was studied by using above methods [2,12,25,[28][29][30][31].…”

[sup 13]C NMR Spectroscopic, CV, and Conductivity Studies of Propylene Carbonate-Based Electrolytes Containing Various Lithium Salts

“…[1][2][3][4][5][6][7][8][9][10] Although LiPF 6 -based electrolyte formulations generally provide highly conductive and electrochemically stable solutions, which lead to good cell performance, there is continued interest to identify alternate lithium electrolyte salts that possess greater high temperature resilience and are less expensive. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] In addition to LiPF 6 , the electrochemical properties of a number of lithium salts have been investigated within the context of nonaqueous lithium-based rechargeable batteries, including lithium perchlorate ͑LiClO 4 ͒, 11 lithium tetrafluoroborate ͑LiBF 4 ͒, 13,16 lithium hexafluoroarsenate ͑LiAsF 6 ͒, lithium triflate ͑LiOSO 2 CF 3 ; LiOTf͒, lithium bis͑trifluoromethane-sulfonyl͒imide ͓LiN͑SO 2 CF 3 ͒ 2 ; LiTFSI͔, 15 lithium bis͑pentafluoro-ethanesulfonyl͒imide ͓LiN͑SO 2 CF 2 CF 3 ͒ 2 ; LiBETI͔, lithium trifluorotris͑perfluoroethyl͒phosphate ͓LiPF 3 ͑CF 2 CF 3 ͒ 3 ͔, 18 lithium bis͑oxalato͒borate ͓LiB͑C 2 O 4 ͒ 2 ͔, [19][20][21] lithium ͑malonato oxalato͒bo-rate ͓LiB͑C 3 O 4 ͒ 2 ͔, 23 lithium tris͑trifluoromethanesulfonyl͒methide ͓LiC͑SO 2 CF 3 ͒ 3 ͔, 24 as well as, a number of other fluoroalkyl sulfonate and imide salts. 25,26 To date, none of these electrolyte salts have supplanted the widespread use of LiPF 6 due to one or more shortcomings preventing their adoption, such as poor safety due to toxicity or explosion, high cost, poor electrochemical stability ͑in-cluding SEI forming ...…”