Co-doped Li4Ti5O12 nanosheets with enhanced rate performance for lithium-ion batteries

A Carbon‐Free Li2TiO3/Li2MTi3O8 (M═Zn1/3Co2/3) Nanocomposite as High‐Rate and Long‐Life Anode for Lithium‐Ion Batteries

“…The continuous charge/discharge curves from 0.1 to 20 C are shown in Figure b. It is obvious that the charge voltages increase while the discharge voltages decrease as the rates increase gradually, indicating some electrochemical polarization, especially at high rates, which is similar to the literatures . The superior rate capacity is probably attributed to the nano‐sized primary grains that promote the Li + migration during redox reactions.…”

“…In the initial cycle, the Li 2 TiO 3 /Li 2 MTi 3 O 8 electrode delivers a discharge capacity and charge capacity of 263.2 and 183.9 mAh g −1 , respectively, with a discharge voltage of 0.8 V (vs Li/Li + ), indicating an initial coulombic efficiency of ≈70%, as seen in Figure a. Note that this discharge voltage (0.8 V vs Li/Li + ) is much lower than those of Li 4 Ti 5 O 12 and TiO 2 anodes, which can improve the working voltage of full‐cells. A reversible capacity of 197.9 mAh g −1 with a coulombic efficiency of ≈93% is presented in the second cycle.…”

High‐Throughput Production of Zr‐Doped Li4Ti5O12 Modified by Mesoporous Libaf3 Nanoparticles for Superior Lithium and Potassium Storage

“…This means that part of Ti 4+ has been reduced to Ti 3+ , which can form oxygen vacancies. Thus, with charge compensation, electron concentration increases, improving the electronic conductivity …”

“…[7 In order to increaset he conductivity of LTO, there are many solutions available, such as the synthesis of nanosized LTO, [8] doping with different elements (Mg 2 + ,C o 3 + ,B r À ,N i 2 + ,Z r 4 + ,V 5 + ,N b 5 + and so on). [6,7,[9][10][11][12][13] Since the fluoridec oating (AlF 3 ,L iF,M gF 2 ,C aF 2 ,S rF 2 ) [14][15][16][17][18] can supply ab uffer layer,reduce the decompositionoft he surface electrolyte andd ecrease the activity of oxygen extraction, it can greatly enhance the electrochemical capability. [14] At the same time, in large-scale applications, the shortage of lithium batteries has caused people to pay attention to sodium ionb atteries (NIBs) [19,20] and potassium ion batteries (KIBs).…”

Synthesis of Porous Carbon Nanotubes@LiVTiO4 Composites and Their Advanced Electrochemical Properties for Lithium‐Ion Batteries

“…By comparison, a new negative electrode material with a spinel structure and a general formula of LiMTiO 4 (M═V, Cr), which can effectively improve the electrochemical performance, has investigated widely . Due to the introduction of transition metals, the number of active sites are increased and the electrical conductivity is effectively improved . For example, Luo et al.…”