共查询到20条相似文献,搜索用时 15 毫秒
1.
Jumanova Raigul Rakhymbay Gulmira Abildina Ainaz Avchukir Khaisa Bakhytzhan Yeldana Vacandio Florence Argimbayeva Akmaral 《Journal of Solid State Electrochemistry》2023,27(1):223-233
Journal of Solid State Electrochemistry - The nanotubular structure of titanium dioxide (TiO2) is most suitable for creating high-performance energy storage and conversion devices. This paper... 相似文献
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Mn-based oxides have been regarded as a promising family of cathode materials for high-performance lithium-ion batteries,but the practical applications have bee... 相似文献
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Herein,a simple yet efficient hydrothermal strategy is developed to in-situ convert multi-layered niobium-based MXene(Nb2 CTx) to hierarchical Nb2 CTx/Nb2O5 composite.In the hybrid,the Nb2O5 nanorods are well dispersed in and/or on the Nb2 CTx.Thanks to the synergetic contributions from the high capacity of Nb2O5 and superb electrical conductivity of the two-dimensional Nb2 CTx 相似文献
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Iron oxide (Fe2O3) was utilized to enhance the electrochemical properties of SiO as a promising anode for Li-ion batteries. An SiO/Fe2O3 composite, composed of SiO coated with Fe2O3 nanoparticles, was synthesized by mechanical milling and characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The electrochemical properties of the SiO/Fe2O3 composite, SiO, and mechanically milled SiO as anodes for Li-ion batteries were then investigated. The SiO/Fe2O3 composite showed superior performance compared with the two Fe2O3-free SiO samples, including an increased initial coulombic efficiency, enhanced rate capability, and better capacity retention. 相似文献
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Journal of Solid State Electrochemistry - Exploring the fast-charge anodes is crucial to meet the needs of lithium-ion battery (LIB) markets. Here, a hollow hexagonal mesoporous TiO2/carbon... 相似文献
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Jean Jeong-Hoon Kwak Hoyoung Kim Won-Sik Kim Hong-Chan Park Kyu-Young Kim Honggu Yang Ho-Sung Yu Woong-Ryeol Kang Kisuk Hong Seong-Hyeon 《Journal of Solid State Electrochemistry》2017,21(8):2365-2371
Journal of Solid State Electrochemistry - TiO2@SnO2@TiO2 triple-shell nanotubes are fabricated using electrospun polyacrylonitrile (PAN) nanofiber template and plasma-enhanced atomic layer... 相似文献
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The pristine CeVO4 and CeVO4/CNT hybrid composite nanostructured samples were facilely synthesized using a simple silicone oil-bath method.From the X-ray diffra... 相似文献
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《中国化学快报》2022,33(11):4776-4780
Zn2Ti3O8, as a new type of anode material for lithium-ion batteries, is attracting enormous attention because of its low cost and excellent safety. Though decent capacities have been reported, the electrochemical reaction mechanism of Zn2Ti3O8 has rarely been studied. In this work, a porous Zn2Ti3O8 anode with considerably high capacity (421 mAh/g at 100 mA/g and 209 mAh/g at 5000 mA/g after 1500 cycles) was reported, which is even higher than ever reported titanium-based anodes materials including Li4Ti5O12, TiO2 and Li2ZnTi3O8. Here, for the first time, the accurate theoretical capacity of Zn2Ti3O8 was confirmed to be 266.4 mAh/g. It was also found that both intercalation reaction and pseudocapacitance contribute to the actual capacity of Zn2Ti3O8, making it possibly higher than the theoretical value. Most importantly, the porous structure of Zn2Ti3O8 not only promotes the intercalation reaction, but also induces high pseudocapacitance capacity (225.4 mAh/g), which boosts the reversible capacity. Therefore, it is the outstanding pseudocapacitance capacity of porous Zn2Ti3O8 that accounts for high actual capacity exceeding the theoretical one. This work elucidates the superiorities of porous structure and provides an example in designing high-performance electrodes for lithium-ion batteries. 相似文献
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Liu Wenping Xu Huarui Qin Haiqing Lv Yanlu Wang Feng Zhu Guisheng Lin Feng Wang Lihui Ni Chengyuan 《Journal of Solid State Electrochemistry》2019,23(12):3363-3372
Journal of Solid State Electrochemistry - The graphite@nano-Si@C composite was prepared by a designed hot reactor with stirring function by coating pitch carbon on the surface of graphite@nano-Si... 相似文献
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Li Zhitong Zhao Jian Nie Jiajin Yao Shaowei Wang Jing Feng Xiaoxin 《Journal of Solid State Electrochemistry》2020,24(5):1133-1142
Journal of Solid State Electrochemistry - In this paper, Co3O4/NiO/C composites were prepared by in situ co-precipitation and heat treatment with Zn/Co-ZIF-derived N-doped porous carbon as carbon... 相似文献
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Bingbing Deng Lian Shen Yangai Liu Tao Yang Manshu Zhang Renjie Liu Zhaohui Huang Minghao Fang Xiaowen Wu 《中国化学快报》2017,28(12):2281-2284
A novel porous silicon was synthesized through a magnesiothermic reduction method of molecular sieve for the first time, the porous silicon was used as anode material, which shows a high initial specific capacity of 2018.5 mAh/g with current density of 0.1 A/g. 相似文献
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Khomane RB 《Journal of colloid and interface science》2011,356(1):369-372
Mesoporous rutile TiO(2) nanoneedles have been successfully synthesized using a reverse microemulsion-mediated sol-gel method at room temperature. The materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and the Bruauner-Emmet-Teller (BET) adsorption method, and their electrochemical properties were investigated by galvanostatic charge and discharge tests. XRD observations revealed the formation of a pure rutile TiO(2) phase. Furthermore, TEM observation revealed the presence of a highly porous needle-like morphology. The electrochemical measurements show that the nanoneedles deliver an initial capacity of 305 mA h g(-1) as anode material for Li-ion batteries and sustain a capacity value of 128 mA h g(-1) beyond 15 cycles. The reported synthesis is simple, mild, energy efficient, and without postcalcination. 相似文献
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Fu Yajing Li Ji Wang Hairui Zhang Jiahao Ma Zhijun Yi Qiong Liu Jianwen Wang Shiquan 《Journal of Solid State Electrochemistry》2023,27(9):2523-2531
Journal of Solid State Electrochemistry - FeS2/CoS and FeS2/CoS/C composites were synthesized by solvothermal method and following vapor phase vulcanization at mild temperature with binary oxide... 相似文献
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《Journal of Energy Chemistry》2018,(6)
To design the high-energy-density Li-ion batteries, the anode materials with high specific capacity have attracted much attention. In this work, we adopt the first principles calculations to investigate the possibility of a new two dimensional boron material, named BG, as anode material for Li-ion batteries. The calculated results show that the maximum theoretical specific capacity of B_G is 1653 m Ah g~(-1)(LiB1.5).Additionally, the energy barriers of Li ion and Li vacancy diffusion are 330 meV and 110 meV, respectively, which imply fast charge and discharge ability for BGas an anode material. The theoretical findings reported in this work suggest that BGis a potential candidate as anode material of high-energy-density Li-ion batteries. 相似文献
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Although various transition metal oxides have been reported to act as low potential Li insertion hosts, the oxyhydroxides have remained unexplored to date. We show here that the hydroxide ions present in transition metal oxyhydroxides do not interfere with the lithium uptake and extraction, permitting very good reversibility of the reduction/oxidation reactions. Goethite (α-FeOOH) nanocrystals can uptake and extract large amount of Li via the conversion reaction mechanism, providing a reversible capacity of 500 mA h g−1 at an average potential of 0.85 V vs. Li/Li+. The mechanism was examined using a combination of X-ray diffraction, electron microscopy, and the corresponding selected area electron diffractions (SAEDs). The α-FeOOH is reduced into nanoparticles of metallic Fe0 embedded in an amorphous matrix of Li2O and LiOH in the first discharge; the subsequent cyclings are redox reactions between metallic Fe0 and Fe2O3 clusters. 相似文献
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The Li2ZnTi3-xMoxO8 (x = 0, 0.05, 0.1 and 0.15) anode materials are successfully synthesized through a simple solid-state method, and few Li2MoO4 phase can be found in Li2ZnTi3-xMoxO8 (x = 0.1 and 0.15). All samples are composed of nanocrystalline particles and irregular micron-sized particles with a relatively uniform particle size of 100–200 nm Li2ZnTi2.9Mo0.1O8 shows the best electrochemical properties among all samples. The Li2ZnTi2.9Mo0.1O8 delivers a charge/discharge capacity of 188.1/188.2 mA h/g at 1 A/g after 400 cycles, but the corresponding capacity of pristine Li2ZnTi3O8 is only 104.5 (102.2) mA h/g. The Mo6+ doping enhances the reversible capacity, rate performance, and cycling stability of Li2ZnTi3O8, especially at large current densities. The improved electrochemical performance of Li2ZnTi3-xMoxO8 can be ascribed to the enhanced electrical conductivity, improved intercalation/de-intercalation reversibility of Li ions, increased lithium-ion diffusion coefficients, and reduced charge-transfer resistance. This work provides an effective strategy to construct high-performance anode materials for advanced lithium-ion battery; this effective design strategy may be used to enhance the reversible specific capacity, and rate the performance and cycle stability of other insertion-host anode materials. 相似文献
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Zhiqiang Hao Nikolay Dimov Jeng-Kuei Chang Shigeto Okada 《Journal of Energy Chemistry》2022,(1):463-474
Tin phosphide(Sn4P3)is a promising anode material for sodium-ion batteries because of its relatively large theoretical capacity,appropriate Na+ alloying potential,and good cyclic stability.Herein,the Sn4P3 embedded into a carbon matrix with good rate performance and long cycle life is reported.The Sn4P3-C composite exhibits excellent rate performance(540 mAh g-1 at 5 A g-1)and the highest reversible capacity(844 mAh g-1 at 0.5 A g-1)among Sn4P3-based anodes reported so far.Its reversible capacity is as high as 705 mAh g-1 even after 100 cycles at 0.5 A g-1.Besides,its initial Coulomb efficiency can reach 85.6%,with the average Coulomb efficiency exceeding 99.75%from the 3rd to 100th cycles.Na2C6O6 is firstly used as a cathode when Sn4P3 acts as anode,and the Na-Sn4P3-C//Na2C6O6 full cell shows excellent electrochemical performance.These results demonstrate that the Sn4P3-C composite prepared in this work displays high-rate capability and superior cyclic performance,and thus is a potential anode for sodium ion batteries. 相似文献
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To improve the cycle performance of the thick Sn electrode of 10 μm thickness, the Sn–C composite electrodes were fabricated by co-electrodeposition with two kinds of carbon particles which were the graphite and the acetylene black. The acetylene black particles were well dispersed in the Sn matrix more than the graphite particles. The carbon content in the Sn–C composite electrodes was measured about 12% of the graphite and 16% of the acetylene black particles. Even though carbon content of the Sn–acetylene black electrode was not significantly higher than that of the Sn–graphite electrode, the cycle performance of the Sn–acetylene black electrode was much higher than that of the Sn–graphite electrode. This demonstrates that the ‘buffering effects’ of well dispersed acetylene black particles was larger than that of the graphite particles. The cycle performance of the Sn–acetylene black electrode was significantly improved by the aging treatment. 相似文献