Improving the Electrochemical Performance of Li₂ZnTi₃O₈ by Surface KCl Modification

Abstract

Inorganic salt of KCl was first employed as an effective modifier to modify Li2ZnTi3O8 anode material via simply mixing in KCl solution followed by sintering at 800 °C in air. The Li2ZnTi3O8 modified with 1.0 wt % KCl exhibited splendid rate capabilities (retaining reversible capacities of 225.6, 195.4, 178.0, 162.4, and 135.6 mAh g–1 at 100, 200, 400, 800, and 1600 mA g–1, respectively) and excellent long-term cycling stability (maintaining a capacity of 201.6 mAh g–1 after 700 cycles). Combining structural characterization with electrochemical analysis, the KCl modification leads to simultaneous doping of K+ and Cl– in Li2ZnTi3O8, contributing to enhance the electronic and ionic conductivities of Li2ZnTi3O8.

K-doped Li2ZnTi3O8/C as an efficient anode material with high performance for Li-ion batteries

“…Peaks observed at about 292.78 and 295.58 eV (Fig. 1(D)) appeared to correspond well to K 2p 3/2 and K 2p 1/2 , 37 verifying the presence of K + in the Li 1.9 K 0.1 ZnTi 3 O 8 /C sample tested. The peak observed at about 54.48 eV in the spectrum of the Li 1.9 K 0.1 ZnTi 3 O 8 /C sample (Fig.…”

La2O3-coated Li2ZnTi3O8@C as a high performance anode for lithium-ion batteries

“…Surface coating has been considered as an effective method of solving the issue. [28][29][30][31] Tang et al 29 Herein, we rstly report the fabrication of Li 2 ZnTi 3 O 8 @-C@La 2 O 3 co-coated with carbon and La 2 O 3 by a simple solidstate route using nitrilotriacetic acid (NTA) as the carbon source (Fig. 1).…”

Li2ZnTi3O8/graphene nanocomposite as a high-performance anode material for lithium-ion batteries

“…Fig. 5a exhibits the initial charge-discharge curves of LZTO and LZTO/G at 1 A g À1 in the range of 0.02-3.0 V. For each sample, a charge plateau (1.48 V) and a corresponding discharge plateau (0.37 V) are observed, which indicate the typical electrochemical reaction of LZTO; [1][2][3][4][5][6][7][8][9][10][11] this is further conrmed by the results of the CV technique ( Fig. S7 and Table S4 †).…”

“…Spinel Li 2 ZnTi 3 O 8 (LZTO) is highly competitive as an anode material for lithium-ion batteries (LIBs) due to its environmentfriendly raw materials, good safety and simple synthetic process. [1][2][3][4][5][6][7][8][9][10][11] The insertion/deinsertion reaction for Li + ions in LZTO can be expressed as follows:…”