A designed core-shell structural composite of lithium terephthalate coating on Li4Ti5O12 as anode for lithium ion batteries

Preparation of Ce- and La-Doped Li4Ti5O12 Nanosheets and Their Electrochemical Performance in Li Half Cell and Li4Ti5O12/LiFePO4 Full Cell Batteries

“…So far, a lot of strategies have been proposed to enhance the electronic conductivity and/or Li + diffusion kinetics of LTO, including reducing the particle size [2,6,7,8,9,10,11,12,13,14], heteroatom doping, and coating with highly conductive additive [15,16,17,18]. The introduction of carbon materials can improve electron transfer on the surface of LTO, while lowering volumetric energy density [19,20,21,22,23].…”

“…The key issue for Li 4 Ti 5 O 12 is its poor intrinsic electronic conductivity (~10 −13 –10 −14 S·cm −1 ) and low Li + diffusion kinetics, which can restrict rate performance when LTO is applied in EV [ 2 ]. So far, a lot of strategies have been proposed to enhance the electronic conductivity and/or Li + diffusion kinetics of LTO, including reducing the particle size [ 2 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ], heteroatom doping, and coating with highly conductive additive [ 15 , 16 , 17 , 18 ]. The introduction of carbon materials can improve electron transfer on the surface of LTO, while lowering volumetric energy density [ 19 , 20 , 21 , 22 , 23 ].…”

Lithium Bis(fluorosulfonyl)imide for Stabilized Interphases on Conjugated Dicarboxylate Electrode

“…As seen in Figure a and b, both kinds of cells show stable discharge/charge plateaus in the voltage range of 0.8–1.0 V, ascribing to the lithiation/delithiation processes of the active materials (i.e., conversion between Li 2 C 8 H 4 O 4 and Li 4 C 8 H 4 O 4 ). It is interesting to note that, under testing conditions, both cells exhibit two plateaus during charge processes (i.e., 0.9 and 1.0 V vs Li/Li + ), implying that the initial oxidative reactions of the lithium-rich state (i.e., Li 4 C 8 H 4 O 4 ) are likely to afford the intermediate compound (i.e., Li 3 C 8 H 4 O 4 ) and then transformed into the final state LiTPA (i.e., Li 2 C 8 H 4 O 4 ), which is in line with the results reported in previous work. , …”

“…It is interesting to note that, under testing conditions, both cells exhibit two plateaus during charge processes (i.e., 0.9 and 1.0 V vs Li/Li + ), implying that the initial oxidative reactions of the lithium-rich state (i.e., Li 4 C 8 H 4 O 4 ) are likely to afford the intermediate compound (i.e., Li 3 C 8 H 4 O 4 ) and then transformed into the final state LiTPA (i.e., Li 2 C 8 H 4 O 4 ), which is in line with the results reported in previous work. 17,20 In principle, the two-electron redox reactions between LiTPA (Li 2 C 8 H 4 O 4 ) and Li2TPA (Li 4 C 8 H 4 O 4 ) could deliver a theoretical capacity of 290 mAh per LiTPA molecule. However, the discharge capacities at the first cycle exceed surprisingly high values of 400 mAh g −1 (vs LiTPA) for two kinds of cells, i.e., 426 mAh g −1 (LiFSI, Figure 3a) and 436 mAh g −1 (LiPF 6 , Figure 3b).…”

“…Besides, the theoretical specific capacity of LiTPA could reach a high value of 290 mAh g –1 . In the past decade, further improvement of the LiTPA-based electrodes has been performed by several research groups and significant progress has been achieved, − especially in accelerating the electronic transport in the LiTPA-based electrodes. For instance, Li et al observed that the electronic conductivity of LiTPA could be remarkably enhanced by adding graphene and in situ generated conductive metallic particles. , …”