Recent progresses on electrolytes of fluorosulfonimide anions for improving the performances of rechargeable Li and Li-ion battery

Self‐Standing Highly Conductive Solid Electrolytes Based on Block Copolymers for Rechargeable All‐Solid‐State Lithium‐Metal Batteries

“…The slightly lower value of T d for BCP70‐3# compared to that for RE imposes that the pyrolysis of the electrolytes is dominated by the thermal lability of the Jeffamine‐based copolymer matrix. This is in agreement with the nearly overlapped TGA traces between the copolymer electrolyte (BCP70‐3#) and its matrix (BCP70), and the reported excellent thermal stability for LiTFSI ( T d =384 °C). One may also note that the copolymer electrolyte (BCP70‐3#) has a T d value very close to the homopolymer electrolyte (JH‐3#), suggesting that the introduction of PS block does not affect the thermal stability of the Jeffamine‐based SPEs and thermal degradation is initiated by polyether chain decomposition.…”

Solid polymer electrolyte comprised of lithium salt/ether functionalized ammonium-based polymeric ionic liquid with bis(fluorosulfonyl)imide

“…So far, the development of PILs as electrolyte materials mainly focused on the bis(trifluoromethanesulfonyl)imide ([N(SO 2 CF 3 ) 2 ] − , TFSI − ) anion because of its highly delocalized charge distribution and excellent plasticizing effect [1,[18][19][20][21][22]. The bis(fluorosulfonyl)imide ([N(SO 2 F) 2 ] − , FSI − ) anion is a homologue of TFSI − anion, and in recent years both lithium salt (i.e., lithium bis(fluorosulfonyl)imide, LiFSI) and ionic liquids (ILs) with FSI − anion have been intensively studied as electrolyte materials for Li and Li-ion battery [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38], because of its excellent compatibility with various electrodes, such as Li metal [25,29], graphitized carbon [26][27][28], and silicon [33] anodes and LiFePO 4 and LiCoO 2 cathodes in conventional liquid carbonate electrolyte [31,32], room temperature ionic liquids [25][26][27][28][29], ambient temperature molten salt [30,34,35], and polymer electrolyte systems [23,24,36,<...>…”

Lithium salt with a super-delocalized perfluorinated sulfonimide anion as conducting salt for lithium-ion cells: Physicochemical and electrochemical properties

“…Over the past three decades, a number of weakly coordinating anions have been proposed as possible anionic counterparts of lithium salts for LIBs, such as those containing nitrogen [13e21], phosphorus [22e27], carbon [28], or boron [29e38] as a central atom, large cluster-based anions [39], and aromatic heterocyclics [40,41], most of which are well reviewed in literature [1e3, 42,43]. Among these salts, lithium bis(trifluoromethanesulfonyl)imide (Li [(CF 3 SO 2 ) 2 N], LiTFSI) has ever been extensively studied as potential replacement for LiPF 6 [44e46], mainly driven by its advantageous thermal and chemical stability over LiPF 6 .…”