Nanomaterials
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2022
·Vol. 12
·期 5
·815
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IF 5.719
Yang Xia,Zheng Fang,Chengwei Lu,Zhen Xiao,Xinping He,Yongping Gan,Hui Huang,Guoguang Wang,Wenkui Zhang
Conventional lithium-ion batteries with a limited energy density are unable to assume the responsibility of energy-structure innovation. Lithium-selenium (Li-Se) batteries are considered to be the next generation energy storage devices since Se cathodes have high volumetric energy density. However, the shuttle effect and volume expansion of Se cathodes severely restrict the commercialization of Li-Se batteries. Herein, a facile solid-phase synthesis method is successfully developed to fabricate novel pre-lithiated Li2Se-LiTiO2composite cathode materials. Impressively, the rationally designed Li2Se-LiTiO2composites demonstrate significantly enhanced electrochemical performance. On the one hand, the overpotential of Li2Se-LiTiO2cathode extremely decreases from 2.93 V to 2.15 V. On the other hand, the specific discharge capacity of Li2Se-LiTiO2cathode is two times higher than that of Li2Se. Such enhancement is mainly accounted to the emergence of oxygen vacancies during the conversion of Ti4+into Ti3+, as well as the strong chemisorption of LiTiO2particles for polyselenides. This facile pre-lithiated strategy underscores the potential importance of embedding Li into Se for boosting electrochemical performance of Se cathode, which is highly expected for high-performance Li-Se batteries to cover a wide range of practical applications.
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高影响因子
ELECTROCHIMICA ACTA
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2013
·
IF 3.777
Meifen Wu,Zhaoyin Wen,Jun Jin,Yanming Cui
Both AlCl 3 and pyrrole are simultaneously added to the non-aqueous 1 M LiPF 6 /EC + DMC electrolyte and their combinatorial effects on the electrochemical performance of Li electrode are systematically studied. A composite protective film of Li–Al alloy and lithium pyrrolide is demonstrated on the Li surface. XRD, EDS, XPS and FTIR are applied to characterize the film. AC impedance, cathodic polarization and galvanostatic charge/discharge cycling tests are performed to evaluate the electrochemical behaviors of the film. It is indicated that the composite protective film formed on Li metal surface in 0.1 M AlCl 3 and 0.1 M pyrrole containing electrolyte is dense and tight with high stability in the electrolyte, and gives rise to a low interface resistance and a greatly improved cycling efficiency of the lithium metal electrode.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 10
·4122-4128
·
IF 3.288
Feiyuan Sun,Hao Feng,Shilun Gao,Dandan Yang,Huabin Yang
A silicon/antimony/antimony oxide/graphite@amouphous carbon (Si/Sb/Sb2O3/G@C) composite material was prepared successfully via a simple ball milling and high temperature calcination process. Its structural characterization showed that Si and Sb/Sb2O3 were dispersed into the graphite layer and coated with amorphous carbon. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results revealed that Sb2O3 was partly reduced to Sb by carbon, which could improve its electronic conductivity. Besides, Si, Sb, Sb2O3 and carbon have different lithiation/delithiation voltage plateaus, which can act as a mutually buffering matrix, thus improving its electrochemical performance. Due to the high specific capacity, good electronic conductivity and stable cycling performance benefited from the Si/Sb/Sb2O3, Sb/G and G/C, respectively, as well as the mutually buffering matrix of all the active materials, the resulting composite electrode materials exhibit excellent electrochemical performance. The composite material exhibited good cycling performance (a stable reversible delithiation capacity of 567.8 mA h g−1 after 180 cycles), excellent rate capability (∼360 mA h g−1 and 280 mA h g−1 at current densities of 1000 mA g−1 and 2000 mA g−1, respectively) and decreased polarization resistance. This work demonstrates a facile and cost-effective approach to preparing composite materials with complementary advantages for use in high-performance Li-ion batteries.
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高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Zhuosen Wang,Xijun Xu,Zhengbo Liu,Shaomin Ji,Sahar Osman Ahmed Idris,Jun Liu
Lithium–sulfur batteries (LSBs) have attracted much attention in the field of electrochemical energy storage due to their high energy density and low cost. However, the ‘shuttle effect’ of sulfur cathode, resulting in the poor cyclic performance of batteries, is a big barrier for the development of LSBs. To overcome this critical drawback, herein, a matrix of well-designed double carbon shells-encapsulated metallic Mo 2 C nanoparticles (Mo 2 C/C@C) is facilely achieved as an efficient sulfur host for high-performance LSBs. During the electrochemical process, the embedded polar and metallic Mo 2 C nanoparticles could effectively retard polysulfide migration. While for the carbon layers, they can not only act as conductive matrix but also promote the restriction for all sulfur species and maintain the structural stability simultaneously. Specially, the inner carbon layer is mainly for encapsulation and the outside one for surface-modification. As a result, such well-designed Mo 2 C/C@C–S cathode could effectively adsorb soluble polysulfides both from chemical and physical aspects, and well confines them inside the porous structure of Mo 2 C/C@C, thus achieving a high reversible capacity and superior cycling performance.
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高影响因子
Nano Energy
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2018
·
IF 13.12
Yuliang Chen,Zhaowu Wang,Shi Chen,Hui Ren,Bowen Li,Wensheng Yan,Guobin Zhang,Jun Jiang,Chongwen Zou
The use of electric-field to manipulate the transport properties of correlated oxides is promising for achieving nano-functional electronic devices. As a typical correlated oxide material, vanadium dioxide (VO 2 ) displays a special metal-insulator transition (MIT) at about 340 K. In this work, we select a water-free electrolyte gel, Li + /propylene carbonate, to achieve a non-volatile and reversible Li-doping and phase modulation in nano-VO 2 crystal film under gating voltages. Synchrotron characterizations indicate the originally insulating VO 2 undergoes an effective structure change and an increased V 3 d -O 2 p hybrid t 2 g -orbital occupancy, which is responsible for the metallic state formation as proved by first-principle calculation. The field-driving Li-doping shows pronounced facet dependence, indicating the existence of energetically favored channels for Li-ions diffusion along V-V chains as proved by dynamic stimulation. Our current findings will supply opportunities for the electric-field control of atomic sieve, correlated ionitronics and synaptic transistor.
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高影响因子
IONICS
·
2022
·Vol. 28
·期 11
·4977-4987
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IF 2.961
Shi Chonghua,Fu Hang,Nie Jiajin,Yao Shaowei
Bismuth-based material as a stable anode material for lithium-ion battery, which has the advantages of stable operating voltage and large volume energy density. In order to make the most of the theoretical specific capacity of 386 mAh g −1 bismuth-based materials, the carbon coating method will be used to obtain stable specific capacity. However, electrostatic spinning is great method of carbon coated precursor preparation. Here, the BiCl 3 reagent is added into the PAN-DMF spinning liquid to synthesize the fibrous Bi@C composites precursor, and the Bi@C fibre is obtained after heat treatment. Then the Bi@C fibres with different BiCl 3 content are used as anode materials for lithium-ion batteries to test the electrochemical performance of Bi@C. The results show that Bi@C fibre electrode can maintain the discharge capacity of 415.3 mAh g −1 at the current density of 100 mA g −1 for 100 cycles when the content of BiCl 3 is 1.5 g. When the current density is 500 mA g −1 , the specific capacity can still reach 415.7 mAh g −1 after 250 cycles and shows excellent electrochemical performance.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Pengfei Ren,Xiaodong Wang,Bing Huang,Ze Liu,Ruiping Liu
All-solid-state lithium metal batteries have attracted much attention for their high energy density and safety. Lithium argyrodite is an attractive solid-state electrolyte (SSE) due to its high ionic conductivity and excellent processability at room temperature. However, the poor interfacial contact and side reactions between Li metal and lithium argyrodite seriously hinder its practical applications. In this work, we prepared the lithium argyrodite Li 5.5 PS 4.5 Cl 1.5 (LPSCl) with room temperature lithium ion conductivity up to 11.2 mS/cm, and improved the interfacial stability between Li metal and LPSCl by introducing a Li 3 N interlayer with high ionic conductivity. As a result, the interfacial resistance can be reduced to as low as 1.4 Ω cm 2 in symmetric cells. The symmetrical cells can be stably cycled for >650 h at a current density of 0.5 mA cm −2 , with a critical current density as high as 1.9 mA cm −2 . Moreover, a Li/Li 3 N-LPSCl/NCM811 all-solid-state lithium battery also displays high cycling efficiency and stability over 260 cycles at 50 °C. This work provides a new idea for further optimizing the interface of all-solid-state lithium metal batteries .
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高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Syed Danish Ali Zaidi,Chong Wang,Qinjun Shao,Jing Gao,Shengdong Zhu,Haifeng Yuan,Jian Chen
A separator film for high-performance Li-ion batteries was prepared by electrospinning. The film had a hybrid morphology of silica nanofibers (SNFs) and alumina nanoparticles (ANPs), with a smooth surface, polymer-free composition, high porosity (79%), high electrolyte uptake (876%), and excellent thermal stability. Contact angle measurements demonstrated the better immersion capability of the SNF-ANP separator film for commercial liquid electrolytes than a commercial CELGARD 2500 separator film. Moreover, compared to the commercial CELGARD 2500 separator, the ionic conductivity of the SNF-ANP separator film was nearly three times higher, the bulk resistance was lower at elevated temperature (120 °C), the interfacial resistance with lithium metal was lower, and the electrochemical window was wider. Full cells were fabricated to determine the cell performance at room temperature. The specific capacity of the full cell with the SNF-ANP separator film was 165 mAh g −1 ; the cell was stable for 100 charge/discharge cycles and exhibited a capacity retention of 99.9%. Notably, the electrospun SNF-ANP separator film can be safely used in Li-ion or Li-S rechargeable batteries.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Chuang-Chao Sun,You-Zhi Song,Yan Yan,Jia-Jia Yuan,Zheng Huang,Li-Feng Fang,Bao-Ku Zhu
Lithium−sulfur (Li−S) batteries are of great interest in next-generation flexible electronic devices for their much higher energy density. However, current Li−S batteries are still facing the problem about rational construction of the flexible power sources. Herein, a novel flexible and integrated electrode is fabricated through a non-solvent induced phase separation (NIPS) method with poly(m-phenylene isophthalamide) (PMIA) as the flexible support for Li-S batteries. Notably, the integrated electrode shows the capability of adapting the volume expansion of cathode materials, inhibiting the diffusion of lithium polysulfides and suppressing the dendrite growth of Li. As a result, battery assembled with the fabricated electrode exhibits a capacity of 773.6 mAh g −1 at 1 C. After 600 cycles, the capacity still remains at 565.5 mAh g −1 with the calculated capacity fade of 0.045% per cycle. This proposed strategy is advanced and feasible, which has great potential in next-generation portable electronic devices.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Ao Li,Binfang He,Guangchao Jin,Dongmei Liu,Jingbo Chen
Li-rich manganese-based cathode material is expected to be extremely promising for next-generation lithium-ion batteries due to its high specific capacity derived from additional anion redox behavior and low cost of the main element manganese. However, the irreversible release of lattice oxygen results in poor structural stability and inferior electrochemical performances , such as low initial Coulomb efficiency, irreversible capacity decay and serious voltage decay, which limits its commercialization. Herein, a simple strategy to improve the structural stability and electrochemical performances by one-step treatment with triethylamine (TEA) at moderate temperature is reported. TEA was used as a surface treatment reagent to prepare the modified Li-rich manganese-based cathode materials with oxygen vacancies and local structural distortion on the surface. The presence of surface distortion layer and oxygen vacancies inhibits irreversible oxygen release. The result exhibits that initial Coulomb efficiency, rate performance and initial discharge specific capacities are improved. After 100 cycles at a current density of 1 C, the specific capacity of the surface-treated material is 204.3 mAh g -1 (172.6 mAh g -1 for the pristine material), with a capacity retention of 81.26%. Even at a high current density of 10 C, the discharge specific capacity of 139.4 mAh g -1 is still achieved, demonstrating the excellent electrochemical performance. This study provides a simple and effective strategy for constructing special surface structures on Li-rich manganese-based materials to achieve high performance.
研究领域:
材料科学
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电化学
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能源存储
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锂离子电池
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固态化学
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高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Dandan Yang,Jing Shi,Jinhong Shi,Huabin Yang
A silicon/tin@amorphous carbon-graphite (Si/Sn@C-G) composite material was successfully prepared by a simple high energy ball milling and annealing process , exhibiting excellent electrochemical performance in lithium-ion batteries. Structural characterization showed that the phase separated Si/Sn mixture was coated by amorphous carbon and were highly dispersed into the graphitic sheets. As a result, the Si/Sn@C-G composite exhibited a high initial coulombic efficiency of 81.5% and a stable reversible capacity of 612.6 mAh g −1 even after 100 cycles. Cyclic voltammetry and electrochemical impedance spectroscopy results indicated that the Sn acted as an active matrix and could obviously decrease the polarization resistance (Rp). And the ductile Sn could not only cushion the volumetric deformation of Si, but could also improve the Si dispersion. This work demonstrated a facile approach to synthesize highly stable Si/Sn@C-G composite in lithium-ions batteries.
研究领域:
材料科学
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储能
·
电化学
·
纳米复合材料
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电池技术
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DOI
高影响因子
THIN SOLID FILMS
·
2024
·
IF 2
Changhai Zhang,Xue Zhang,Bowen Zhang,Chao Yin,Yue Zhang,Yongquan Zhang,Tiandong Zhang,Yang Cui,Qingguo Chi
s The lead zirconate (PZO) anti-ferroelectric thin film capacitors, known for their high power density and rapid discharge speed, have garnered significant attention for applications in energy storage. Efficient strategies to enhance energy storage performance include doping and low-temperature annealing. PZO-based films, grown on Pt/Ti/SiO 2 /Si using the sol-gel method, undergo modification through Li + doping to enhance polarization and lowering the annealing temperature to improve the breakdown electric field. The results indicate that Pb(Zr 0.92 Li 0.08 )O 3 films, annealed at 550°C, exhibit a high energy storage density of 29.53 J/cm 3 , an efficiency of 82.38 % in an electric field of 4000 kV/cm, and maintain excellent electrical properties through 10 7 charge-discharge cycles. This study demonstrates that doping and low-temperature annealing enhance the energy storage properties of Pb(Zr 0.92 Li 0.08 )O 3 -based films, rendering them highly promising for application in dielectric capacitors.
研究领域:
材料科学
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能量存储
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陶瓷薄膜
·
电介质与绝缘体
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高影响因子
危险品化学品经营许可证（带存储）