Ultrahigh capacity and cyclability of dual-phase TiO2nanowires with low working potential at room and subzero temperatures

Lin，Dongmei1; Lyu，Linlong1; Li，Kaikai2; Chen，Guohua1; Yao，Haimin1; Kang，Feiyu3; Li，Baohua3; Zhou，Limin4

2021-04-14

10.1039/d0ta12112f

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

The commercialization of TiOmaterials for lithium-ion battery (LIB) anodes has been seriously limited due to unsatisfactory capacities and high voltage plateausvs.Li/Li(∼1.75 V). In this work, we synthesized unique dual-phase TiOnanowires composed of anatase and TiO-B phases with tunable phase ratios and studied their electrochemical performance in the extended potential range of 0.01-3.0 V. It was found that the dual-phase nanowire with a phase ratio of ∼1.0, named TiO-350, possesses the best rate and cyclic performance. More importantly, lowering the discharge cut-off voltage from 1.0 V to 0.01 V significantly increases the capacities, and moreover results in a decreased average discharge voltage of ∼0.58 Vvs.Li/Li. At the rates of 0.5C and 1C, TiO-350 delivers the ultrahigh capacities of 518.0 and 444.5 mA h gand remarkable long-term cyclic stability, which are strikingly higher than those reported in the literature and the theoretical capacity of TiO. Cyclic voltammetry results indicated that the ultrahigh capacity of the TiOnanowire is the main reason that the capacitive contribution is below 1.0 V. Structural analyses indicated the solid solution reaction of TiO-350 nanowires with Liand the excellent structure stability during cycling, which contributes to the excellent cyclic performance of nanowires. Furthermore, the TiO-350 anode exhibits superb low-temperature performance between 0.01 V and 3.0 V at 273 K and 248 K. This work demonstrates a TiO-based anode with ultrahigh capacity and low working potential, and will promote the practical application of TiO-based materials for all-climate LIB anodes.

SCI ; EI

英语

其他

General Research Fund[15210718,16213315] ; Hong Kong Research Grants Council and Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program[2017BT01N111]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000634383400001

ROYAL SOC CHEMISTRY

20211610216205

Anodes ; Cyclic voltammetry ; Lithium-ion batteries ; Nanowires ; Oxide minerals ; Temperature

Minerals:482.2 ; Thermodynamics:641.1 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Inorganic Compounds:804.2 ; Solid State Physics:933

2-s2.0-85104003698

Scopus

1.Department of Mechanical Engineering,Hong Kong Polytechnic University,China
2.School of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen,China
3.Shenzhen Key Laboratory of Power Battery Safety,Shenzhen Geim Graphene Center,Graduate School at Shenzhen,Tsinghua University,Shenzhen,518055,China
4.School of System Design and Intelligent Manufacturing,Southern University of Science and Technology,Shenzhen,China

Lin，Dongmei,Lyu，Linlong,Li，Kaikai,et al. Ultrahigh capacity and cyclability of dual-phase TiO2nanowires with low working potential at room and subzero temperatures[J]. Journal of Materials Chemistry A,2021,9(14):9256-9265.

Lin，Dongmei.,Lyu，Linlong.,Li，Kaikai.,Chen，Guohua.,Yao，Haimin.,...&Zhou，Limin.(2021).Ultrahigh capacity and cyclability of dual-phase TiO2nanowires with low working potential at room and subzero temperatures.Journal of Materials Chemistry A,9(14),9256-9265.

Lin，Dongmei,et al."Ultrahigh capacity and cyclability of dual-phase TiO2nanowires with low working potential at room and subzero temperatures".Journal of Materials Chemistry A 9.14(2021):9256-9265.