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Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Recent Progress On Tio2-Based Anode Materials For Sodium-Ion Batteries, Si-Tian Lian, Jian-Shuai Lv, Qiang Yu, Guang-Wu Hu, Zhuo Chen, Liang Zhou, Li-Qiang Mai
Recent Progress On Tio2-Based Anode Materials For Sodium-Ion Batteries, Si-Tian Lian, Jian-Shuai Lv, Qiang Yu, Guang-Wu Hu, Zhuo Chen, Liang Zhou, Li-Qiang Mai
Journal of Electrochemistry
Titanium dioxide (TiO2) represents a stable, low-cost, and nontoxic anode material for sodium-ion batteries (SIBs). However, the low electrical conductivity limits its electrochemical activity (specific capacity) and rate capability, hindering its widespread applications. In this article, we show that different crystal forms of TiO2 have different pore structures, resulting in the distinct sodium storage capacities. Accordingly, the article introduces how TiO2 microstructures influence sodium storage. The nanoparticle structure can improve the rate performance of the material due to its short ion diffusion distance, and the internal cavity of the hollow structure is beneficial to cycle stability. …
Synthesis And Electrochemical Performance Of Xlifepo4·Yli3v2(Po4)3 Composites, Ping-Ping Ma, Zhi-Jian Liu, Jian-Hua Xia, Yu Chen, Pu Hu, Zhi-Chao Lu, Ding-Guo Xia
Synthesis And Electrochemical Performance Of Xlifepo4·Yli3v2(Po4)3 Composites, Ping-Ping Ma, Zhi-Jian Liu, Jian-Hua Xia, Yu Chen, Pu Hu, Zhi-Chao Lu, Ding-Guo Xia
Journal of Electrochemistry
A series of xLiFePO4·yLi3V2(PO4)3 composites were systematically synthesized through solid state reactions by variations in the proportions of LiFePO4 and Li3V2(PO4)3. The properties of the prepared compounds were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurements. The capacity of 162.7 mAh/g at 0.2 C rate was obtained with the relatively good cycle stability and good conductivity for 0.95LiFePO4·0.05Li3V2(PO4)3 due to more uniformed distributed and smaller particle sizes.
The Electrochemical Properties Of Cathode Materials Limxv3-Xo8, Hui Yang, Gang-Gang Zhao, Juan Li
The Electrochemical Properties Of Cathode Materials Limxv3-Xo8, Hui Yang, Gang-Gang Zhao, Juan Li
Journal of Electrochemistry
The cathode material of LiMxV3-xO8 was fabricated by sol-gel method using citric acid as a chelating agent and doping transition metal ions M (Mn, Ti, Co and Ni). The structure, morphology and electrochemical proprieties of the LiMxV3-xO8 samples were investigated by XRD, TGA/DTA, SEM, charge-discharge and CV measurements. The results showed that different calcining temperatures result in different structures and morphologies, which lead to different discharge capacities. The specific discharge capacity of the sample calcined at 500℃ for 6 h was up to 300.4 mAh/g in the first cycle, and the capacity decreased with the increasing of calcining temperature. The …
Prerapation And Supercapacitor Property Of Al Doped Co_3o_4, Xin Ge, Ye Chen, Chun-Xia Zhang, Chang Shu
Prerapation And Supercapacitor Property Of Al Doped Co_3o_4, Xin Ge, Ye Chen, Chun-Xia Zhang, Chang Shu
Journal of Electrochemistry
With KOH as precipitator to prepare Aluminum doped Co3O4,X-ray diffraction indicated that the doping Al did not change the crystal structure of Co3O4.Electrochemical properties of the sample were tested by cyclic voltammetry and constant-current charge/discharge.The results showed that the chemical doping improved the specific capacitance.When the mol ratio of Co(Ⅱ) with Al(Ⅲ)was 1∶0.05,the specific capacitance was up to 518.07 F/g within 0～400 mV potenitial at current density 5 mA/cm2.