INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·Vol. 44
·期 39
·22250-22262
·
IF 4.084
Hongri Wan,Xiaofang Hu
Nitrogen/sulfur co-doped disordered porous biocarbon was facilely synthesized and applied as anode materials for lithium/sodium ion batteries. Benefiting from high nitrogen (3.38 wt%) and sulfur (9.75 wt%) doping, NS 1-1 as anode materials showed a high reversible capacity of 1010.4 mA h g −1 at 0.1 A g −1 in lithium ion batteries . In addition, it also exhibited excellent cycling stability, which can maintain at 412 mAh g -1 after 1000 cycles at 5 A g −1 . As anode materials of sodium ion batteries , NS 1-1 can still reach 745.2 mA h g −1 at 100 mAg -1 after 100 cycles. At a high current density (5 A g -1 ), the reversible capacity is 272.5 mA h g −1 after 1000 cycles, which exhibits excellent electrochemical performance and cycle stability. The preeminent electrochemical performance can be attributed to three effects: (1) the high level of sulfur and nitrogen; (2) the synergic effect of dual-doping heteroatoms; (3) the large quantity of edge defects and abundant micropores and mesopores , providing extra Li/Na storage regions. This disordered porous biocarbon co-doped with nitrogen/sulfur exhibits unique features, which is very suitable for anode materials of lithium/sodium ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能碳材料
✓ 已验证
DOI
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 9
·4171-4178
·
IF 7.394
Tingting Li,Huanhuan Li,Zhennan Wu,Hongxia Hao,Jiale Liu,Tingting Huang,Haizhu Sun,Jingping Zhang,Hao Zhang,Zuoxing Guo
The excellent electrochemical performance of greigite (Fe3S4) coupled with its vast abundance and low toxicity make it a good prospect as an anode material for lithium ion batteries (LIBs). In this research, a simple and feasible approach for producing pure phase, small sized, shape-controllable, and stable Fe3S4 nanoplates (NPs) through hot injection of sulfur solution into Fe(III) solution was demonstrated. The growth of Fe3S4 NPs involves the primary formation of a pyrite (FeS2) nucleus and subsequent Fe(III) doping. The lateral size of the Fe3S4 NPs was controlled further by tuning the experimental variable-dependent reactivity of Fe sources in the nucleation and growth stage. The Fe3S4 NPs embedded in LIBs present a low electrochemical resistance and are highly active in lithiation/delithiation processes.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
无机化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 8
·10633-10639
·
IF 3.45
Guorong Hu,Zhichen Xue,Zhongyuan Luo,Zhongdong Peng,Yanbing Cao,Weigang Wang,Yuexi Zeng,Yong Huang,Yong Tao,Tianfan Li,Zhiyong Zhang,Ke Du
The Li-rich cathode material for long cycle performance and long-term storage performance is a challenge for next-generation lithium-ion batteries due to the rapid capacity degradation over cycling and the formation of residual lithium on the surface during long-term storage. Herein, an elevated performance of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 materials via CeO 2 inlay is reported, which was prepared from Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 by sol-gel inlay with CeO 2 . It was proved by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy that cerium oxide cladding not only covered the surface of the material but also diffused into the interior of the material change crystal structure. Cerium oxide on the cladding not only reduces the material's contact with water and carbon dioxide in the air, but also prevents the material from being corroded by electrolyte during electrochemical test. The position of the transition metal atom is replaced Ce atoms, which increases the unit cell volume and the stability of the Li-rich material during the cycling. The results show that the storage property and the electrochemical cycling property of the material have been improved obviously. The CeO 2 inlaid lithium rich material discharged 204.6 mAh/g for the first time at the current of 1C, and 164.4 mAh/g after 150 charge and discharge cycles with corresponding capacity retention rate of 80.35%, compared with the retention rate of 57.26% for pristine Li-rich material capacity. After being stored in humid air for 40 days, the CeO 2 inlaid lithium-rich material showed better electrochemical performance than the pristine one. It is powerfully demonstrated that the CeO 2 inlay strategy here holds huge promise for surface modification of electrode materials for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
锂离子电池
·
能源存储
·
无机非金属材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 9
·4604-4609
·
IF 2.936
Lei Lü,Hongming Lou,Yinglin Xiao,Guangzhao Zhang,Chaoyang Wang,Yonghong Deng
Triblock copolymer polydopamine-polyacrylic-polyoxyethylene (PDA-PAA-PEO) with excellent performance as a binder for silicon anodes was synthesized. Its structure was confirmed by 1H-NMR, FTIR and UV-vis spectroscopy. Results of electrochemical measurements indicated that a silicon anode based on PDA-PAA-PEO binder exhibited excellent cycle performance with a reversible capacity of 1597 mA h g−1 after 200 cycles at a current density of 0.5 C, much better than that of an electrode based on a polyvinylidene-fluoride binder. Improvement of the cycle performance and reversible capacity for silicon anodes could be attributed to the strong adhesive and high ion conductivity of PDA-PAA-PEO.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Ya-Jing Hao,Yi-Di Wang,Ye Wang,Xiao-Jing Guo,Xi Yan,Yan Chen,Xuan Zhang,Wan-Zhong Lang
In this study, high-crystallinity and small-particle-size Li2TiO3 nanocrystals were prepared through the reaction between anatase TiO2 and Li2CO3 in a LiCl molten salt and ethanol medium. The Cl– ions reacted with TiO2 to increase the solubility of TiO2 and strengthen the dissolution–precipitation mechanism for Li2TiO3 preparation. The particle diffusion process was found to be the rate control process for the adsorption of Li+ ions. A porous spherical lithium ion adsorbent named HTO–PVC-PANn was prepared using a phase transformation approach. Polyvinyl chloride (PVC was modified with carboxyl groups as a binder, and poly(acrylonitrile) (PAN) was used as a pore former. The interaction between PVC and HTO and PAN was thus strengthened to improve the adsorbent stability. The developed HTO–PVC-PANn adsorbent shows excellent absorption capabilities, stability, and reduced dissolution loss.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
吸附分离
·
能源材料
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Rongfu Xu,Yueya Shi,Changhou Li,Yong Xu
Disposal of waste foundry sand is still one of the most critical challenges faced by the foundry industry. The recycling and reusing of waste foundry sand not only lead to a saving of naturally abundant sand sources but also enhance the sustainability of environmental protection. A new approach in recycling waste foundry sand is introduced in the paper. Based on this approach, porous silicon powder is scalably fabricated, employing magnesiothermic reduction. In the initial one cycle, the capacities of the charge and discharge are 2210 mAh/g and 1602 mAh/g, respectively. The coulombic efficiency of the as-prepared porous silicon is about 72%. The as-prepared porous silicon is considered as the potential material for the preparation of silicon-based anodes in high energy Li-ion batteries.
研究领域:
材料科学
·
环境工程
·
能源化学
·
冶金工程
·
纳米材料
·
电化学
·
可持续材料
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Binggong Yan,Yongchao Wang,Hongliang Ren,Xizhao Lu,Masashi Kotobuki,Bin Liu,Kaiyong Jiang
NASICON-structured solid-state electrolyte, namely Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) possesses high ionic conductivity and good compatibility with lithium metal that make it an ideal electrolyte for next-generation lithium battery. However, high interfacial impedance and possible dendrite limit its practical applications. To reduce interfacial impedance, herein, surface texturing on the LAGP is conducted using a femtosecond laser, and further wetted by ionic liquids. The femtosecond laser-modified surface can effectively increase wettability and improve the interfacial contacts. Low area specific impedance of 81.4Ω cm -2 is obtained and the full battery demonstrates good electrochemical performances.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Fei Li,Ying Wang,Ri-Sheng Bai,Xiao-Xue Wang,Ma-Lin Li,Ji-Jing Xu
The issue of cathode passivation during cycling resulting in rapid capacity fading and premature battery death is a major challenge that hinders the applications of lithium–oxygen (Li–O 2 ) batteries. Here, a facile strategy of introducing a functional separator based on flexible amination SiO 2 /TiO 2 inorganic woven film (STON WF) is proposed to suppress the cathode passivation problem. The by-products, i.e. HCOOLi, CH 3 COOLi and Li 2 CO 3 can be selectively adsorbed on the STON WF separator preferably compared with the cathode and further proved by the density functional theory (DFT) calculations. Thus, benefiting from the separator, the Li–O 2 cells with super P carbon and catalyst-free cathode show enhanced electrochemical performance (5645 mA h g −1 at a current density of 200 mA g −1 ), good rate capability (discharge voltage of 2.43 V at a current density of 1.5 A g −1 ) and especially superior cycle stability up to 268 cycles. These findings present a promising approach to prevent the premature battery death.
研究领域:
电化学
·
能源材料
·
纳米材料
·
表面化学
·
电池技术
✓ 已验证
DOI
高影响因子
CARBON
·
2018
·
IF 7.082
Hedong Chen,Xianhua Hou,Fuming Chen,Shaofeng Wang,Bo Wu,Qiang Ru,Haiqing Qin,Yingchun Xia
To reduce the influence from volume expansion of silicon during lithium lithiation/delithiation, milled flake graphite/plasma nano-silicon@carbon (MFG/PNSi@C) composite with void sandwich structure is synthesized by assembling thin MFG (thickness of 150 nm) sheets loading with carbon-coated PNSi (plasma nano-silicon) via a facile spray drying method. The MFG/PNSi@C composite, as lithium ion battery anode, exhibits excellent electrochemical performance at room temperature and displays an outstanding cyclic property even at high temperature. The MFG/PNSi@C electrode delivers reversible capacity of 1141 mAh g −1 , and high initial Coulombic efficiency of 84.4%, and capacity retention of 84.1% after 200 cycles at a current density of 0.1 A g −1 . Even at the current density of 0.2 and 0.4 A g −1 , the reversible capacities of 1168 and 1102 mAh g −1 can be achieved respectively, with the capacity retention of 68.9% and 63.9% after 200 cycles. Even the work temperature goes up 60 °C, the discharge/charge capacities of 832/808 mAh g −1 can be obtained at a current density of 0.1 A g −1 . The stable cyclic performance is mainly due to the void sandwich structure of the MFG/PNSi@C composite, which dramatically shortens lithium ion diffusion path and pitch carbon shell can buffer huge volume expansion.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
复合材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Zhensheng Hong,Jiaxing Hong,Chaobing Xie,Zhigao Huang,Mingdeng Wei
In this paper, we report a one-step and additive-free route for synthesizing hierarchical rutile TiO 2 with mesocrystalline structure. The rutile TiO 2 architecture constructed by oriented tiny nanorod subunits (around 5 nm in diameter) have nano/submicro hierarchical structures, nanoporous nature, a relatively large surface area and high tapped density. When the hierarchical rutile TiO 2 was studied as anode material for Li-ion batteries (LIBs), they exhibited a high reversible capacity of more than 250 mAh g −1 within a voltage window of 1–3 V, superior rate capability and very good cycling stability with 220 mAh g −1 after 100 cycles at 0.1 A g −1 . It’s notable that the hierarchical rutile TiO 2 exhibited superior Li-ion storage properties under deep cycling conditions (0.01-3.0 V), a stable capacity of 346 mAh g −1 after 100 cycles at 0.1 A g −1 could be remained. The hierarchical TiO 2 also displayed a large reversible capacity of more than 255 mAh g −1 (average value) at 0.05 A g −1 and good cycling performance for Na-ion insertion. These results, in combination with high volumetric storage capacity, render hierarchical rutile TiO 2 a promising anode material for rechargeable batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Chaolumen Wu,Haibin Wang,Chenbo Liao,Jun Yang,Lei Li
A hybrid air-electrode composed of a mixture of fluorinated carbon (CF x ) and Ketjen black (KB) active carbon composite materials was prepared to improve performance of Li-O 2 battery . In the hybrid air-electrodes, four kinds of CF x materials including fluorinated graphite, fluorinated carbon fiber, fluorinated coke and fluorinated black carbon were utilized as lithium insertion materials. The physical properties and morphologies of the KB and CF x carbon materials were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Scanning electron microscopy (SEM) measurements. Compared with the conventional KB air-electrode, all the CF x /KB hybrid air-electrodes in Li-O 2 batteries showed higher specific discharge capacity, especially at high current density . Among these CF x /KB hybrid air-electrodes, the fluorinated graphite based electrode showed the best electrochemical performance in Li-O 2 battery due to its highest discharge capacity of the fluorinated graphite material in the Li/CF x primary battery, highest specific surface area, and highest total pore volume . The electrochemical performance of Li-O 2 and Li-air batteries using the hybrid air-electrodes with the different fluorinated graphite: KB weight ratio, including specific charge and discharge capacity, cycling stability and rate capability were systematically investigated. At a current density of 0.5 mA cm −2 , the fluorinated graphite based air-electrode delivered a high specific discharge capacity of 1138 mAh g −1 in Li-O 2 batteries, which was more than four times than that of the conventional KB air-electrode (265 mAh g −1 ) under same testing conditions. The battery assembled with the fluorinated graphite based air-electrode exhibited better cycling stability than that of the battery assembled with the conventional KB air-electrode.
研究领域:
电化学
·
能源材料
·
纳米材料
·
电池技术
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Zhongren Zhou,Yingjie Zhang,Yixin Hua,Peng Dong,Yan Lin,Mingli Xu,Ding Wang,Xue Li,Lina Han,Jianguo Duan
A facile metallurgical method named molten salt electrolysis was introduced to prepare silicon nanowires (Si NWs) and Cu 9 Si/Si composite nanowires that were used as the anode materials for lithium-ion batteries (LIBs). Simply utilizing SiO 2 and Cu/SiO 2 mixture as the raw materials, by tailoring voltage into the molten salt chamber, SiO 2 was constantly deoxidized to form Si flexible nanowires with 1–3 μm in length and 100–200 nm in width. Cu ingredient further catalyzed the growth of silicon nuclei to generate straight wires with longer 10 μm and narrower 60–100 nm. Benefiting from the compositional and structural advantages, the Cu 9 Si/Si nanocomposite anode exhibited a better capacity retention that delivered a specific capacity of 601.3 mAh·g −1 at 200 mA g −1 after 200 cycles and 398.8 mAh·g −1 at 500 mA g −1 after 500 cycles. Notably Cu 9 Si/Si NWs anode with enhanced rate capability was also obtained, with a specific capacity of 747.6 mAh·g −1 , 550.6 mAh·g −1 and 412.2 mAh·g −1 at the current density of 200 mA g −1 , 500 mA g −1 and 1000 mA g −1 , respectively.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
冶金工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）