APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wenyu Zhao,Qingquan Kong,Xiaoqiang Wu,Xuguang An,Jing Zhang,Xiaonan Liu,Weitang Yao
Aqueous zinc-ion batteries (ZIBs) are potential candidates for achieving considerable energy savings owing to their environmental benignity and low cost. At present, however, Mn 2+ dissolution causes structural failure in manganese-based cathodes. Therefore, addressing this issue is vital for improving their cycling stability and specific capacity. Herein, ε-MnO 2 was obtained by annealing MnCO 3 at 350 °C. Subsequently, ε-MnO 2 was coated with a carbon layer (carbonizing D-glucose) to obtain ε-MnO 2 @C, which effectively mitigated the Mn 2+ dissolution as well as the side reactions between the electrode and electrolyte. Electrochemical results revealed a significant improvement in the specific capacity (280 mAh g −1 at 0.2 A g −1 ) and capacity retention (∼91% over 1700 cycles at 1 A g −1 ) of the ε-MnO 2 @C cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 26
·2000030
·
IF 11.459
Yaru Liang,Xiang Xiong,Zhuijun Xu,Qingbing Xia,Liyang Wan,Rutie Liu,Guoxin Chen,Shu-Lei Chou
Lithium-ion batteries (LIBs) have been widely applied and studied as an effective energy supplement for a variety of electronic devices. Titanium dioxide (TiO 2 ), with a high theoretical capacity (335 mAh g −1 ) and low volume expansion ratio upon lithiation, has been considered as one of the most promising anode materials for LIBs. However, the application of TiO 2 is hindered by its low electrical conductivity and slow ionic diffusion rate. Herein, a 2D ultrathin mesoporous TiO 2 /reduced graphene (rGO) heterostructure is fabricated via a layer-by-layer assembly process. The synergistic effect of ultrathin mesoporous TiO 2 and the rGO nanosheets significantly enhances the ionic diffusion and electron conductivity of the composite. The introduced 2D mesoporous heterostructure delivers a significantly improved capacity of 350 mAh g −1 at a current density of 200 mA g −1 and excellent cycling stability, with a capacity of 245 mAh g −1 maintained over 1000 cycles at a high current density of 1 A g −1 . The in situ transmission electron microscopy analysis indicates that the volume of the as-prepared 2D heterostructures changes slightly upon the insertion and extraction of Li + , thus contributing to the enhanced long-cycle performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2019
·
IF 3.019
Baoe Li,Zhenghao Sun,Yan Zhao,Zisheng Zhang
Lithium-sulfur batteries were considered as a new generation of high energy density batteries, but their commercialization was limited by volume expansion, the low conductivity of sulfur and shuttle effect. To overcome these issues, we developed a three-dimensional carbon nanotube/Fe 3 O 4 microspheres via spray drying and calcination as sulfur host materials (S/CNT/Fe 3 O 4 ). In this three-dimensional microsphere structure, interwoven CNT backbone offers a robust conductive network with sufficient space for loading sulfur, and the polar Fe 3 O 4 nanoparticles can enhance chemical adsorption of polysulfide. Benefiting from these advantages, the S/CNT/Fe 3 O 4 cathode exhibit high initial discharge capacity (1270 mAh g −1 at 0.2 C), superior rate performance (602 mAh g −1 at 3 C), and long cyclic stability (only 0.084% capacity decay per cycle for 300 cycles at 1 C).
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Tielin Wang,Lijie Zhai,Mengting Lv,Jiahao Ji,Tao Lin,Fang Lian,Nan Meng,Huiping Shao
With the rapid advancement of microelectronic devices, 3D printed batteries hold significant potential for development in the battery fields. In this study, the network-structured lithium iron phosphate (LFP) electrodes containing lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) were prepared by 3D gel printing (3DGP) technology and the effect of different LiTFSI content on 3D-printed LFP electrodes was investigated. With increasing the LiTFSI content from 0 to 10 wt%, the apparent viscosity of the 3D printing slurry showed a gradual increase. The printing slurry of 3 wt% LiTFSI showed an apparent viscosity of 9.43 Pa s at a shear rate of 129 s −1 with the 0.16 mm inner diameter printing needle and 0.60 MPa air pressure, and the 3 wt% LiTFSI electrode printed maintained the intact network structure and the printing lines were uniform. The LFP electrodes with LiTFSI contents of 0 wt%, 3 wt%, 6 wt% and 10 wt% showed respectively specific capacities of 147 mAh g −1 , 142 mAh g −1 , 139 mAh g −1 and 127 mAh g −1 at 0.1C. After 0.5C and 300 charge-discharge cycles, the specific capacities of the electrodes were respectively 108.6 mAh g −1 , 104.7 mAh g −1 , 101.6 mAh g −1 and 99 mAh g −1 , and the capacity retention are respectively 87 %, 85 %, 85 % and 88 %, which indicates that these electrodes are cyclically stable and provide some reference for printing composite electrodes.
研究领域:
材料科学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Nan Sheng,Wenlong Li,Shasha Lu,Renjie Liu,Songcen Shi,Hongzhi Liu,Chunyu Zhu
Phase change thermal storage represents a valid solution to the problem of renewable energy indirection. Metals have a high heat storage density and high thermal conductivity, making them a promising material for high-temperature phase change materials, yet limited in application by corrosion. As a solution, a boiling and cold pressing with subsequent calcination method was proposed for the development of shape-stabilized PCMs with Al as a phase change material and Al 2 O 3 as the matrix. A three-step preparation process was involved: (1) Generation of precursor shell layer on the surface of Al micropowder by boiling water treatment. This step was crucial for leakage prevention. (2) Stabilization and composite formation of the phase change material by cold pressing. In this step, we carefully studied the effect of pressure on the structural strength of composite phase change materials (PCCMs) and finally concluded that 10 MPa was the optimal cold pressure. (3) Formation of structurally stable PCCM was finalized by thermal oxidation treatment. The phase transition temperature and latent heat of phase transition of PCCM were 653°C and 68 J/g, respectively. Importantly, these phase transition properties remained consistent over 100 thermal cycles, indicating a good cycling property. These results inform the application of metallic Al in high-temperature thermal storage.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaoli Peng,Hongmei Shen,Kai Su,Wenjie Wang,Shijie Weng,Chenxia Tang,Zhiyu Xue,Yong Xiang
Ternary nickel-rich layered oxide LiNi0.8Co0.1Mn0.1O2 (NCM811) is recognized as a cathode material with a promising future, attributed to its high energy density. However, the pulverization of cathode particles, structural collapse, and electrolyte decomposition are closely associated with the fragile cathode–electrolyte interphases (CEI), which seriously affect the electrochemical performances of ternary high-nickel materials. In this paper, fluorine- and nitrogen-containing methyl-2-nitro-4-(trifluoromethyl)benzoate (MNTB) was selected, which was synergistically regulated with fluoroethylene carbonate (FEC) to generate a robust CEI film. The preferential decomposition of MNTB/FEC results in the formation of an inorganic-rich (Li3N, LiF, and Li2O) CEI film with uniformly dense and stable characteristics, which is conducive to the migration of Li+ and the stability of the NCM811 structure and enhances the cycling stability of the battery system. Simultaneously, MNTB effectively suppresses the adverse reaction associated with increased polarization caused by higher interface impedance due to conventional single FEC additives, further improving the rate capability of the battery. Moreover, MNTB/FEC can effectively eliminate HF, preventing its corrosion on the NCM811 cathode. Under the synergistic effect of MNTB/FEC, after 300 discharge cycles at a high cutoff voltage of 4.3 V and a current density of 1 C (2 mA cm–2), the discharge capacity of the NCM811||Li battery was 150.12 mA h g–1 with a capacity retention of 81.10%, while it was only 32.8% for the standard electrolyte (STD). The discharged capacity of the MNTB/FEC-containing battery was about 115.43 mA h g–1 at the high rate of 7 C, which was considerably higher than that of the STD (93.34 mA h g–1). In this study, the designed MNTB as a novel solvent synergistically regulated with FEC will contribute to the enhanced stability of NCM811 materials at high cutoff voltages and at the same time provide an effective modified strategy to enhance the stability of commercial electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chunyan Luo,Haibo Che,Bingzhe Jia,Xinrui Qiang,Jiarui Li,Lei Wang,Jiale Wang,Yichi Liu,Zhiqiang Li,Xinming Wu
MXene all-solid-state supercapacitors show significant potential for various applications, however, the poor cycling stability under bending stresses restricts their feasibility in commercial use. To address this challenge, a flexible PLA/MXene electrode material with excellent cycling stability was prepared. Electrochemical testing revealed that the PLA/MXene electrode material exhibited a capacity retention of 96.3% after 10,000 cycles under 5 A/g current density. Furthermore, asymmetric all-solid-state supercapacitors, constructed with PLA/MXene film electrodes, retain 92.3% of their initial capacitance after 2,000 charge-discharge cycles at bending angles of 0°, 30°, 60°, and 90°, respectively. The significant improvement suggests that trace amounts of PLA can enhance the cycling stability of MXene electrodes compared to the 84.7% capacitance retention observed in MXene-based supercapacitors. This work provides a straightforward approach to fabricating future flexible wearable devices.
研究领域:
纳米材料科学
·
能源存储技术
·
柔性电子器件
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 14
·e202300655
·
IF 2.2
Lingmei Zhang,Qian Zhao,Chao Feng,Guoning Zhang,Yucheng Wang,Yan Li,Wenjuan Sun,Hong Zhao
Graphical A cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n (SEU-1) has been successfully constructed and comprehensively characterized. The maximum specific capacitance of SEU-1 is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution, suggesting SEU-1 can be applied to high performance SC. Two-dimensional (2D) metal–organic frameworks (MOFs) have been a worldwide research interest due to their potential application in supercapacitors. Herein, a cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n , namely, SEU-1 ; H 2 ppza=3-(pyridin-4-yl)-1 H -pyrazole-5-carboxylic acid) has been synthesized via a one-step solvothermal method. Single X-ray diffraction analysis shows that the SEU-1 exhibits a (3,3,4)-connected 2D structure with a Schläfli symbol of (6 2 ⋅ 8)(6 3 )(6 4 ⋅ 8 ⋅ 10). Variable-temperature magnetic susceptibility data display that antiferromagnetic interactions between two Co II ions exist in SEU-1 . The supercapacitive performance has been evaluated in the three-electrode system. Its maximum specific capacitance is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution. These results demonstrate that SEU-1 is a good candidate for electrode material for electrochemical energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jianbo Wan,Ruiqing Wu,Yiyi Chen,Hao Zhang,Huafeng Li,Bohai Wang,Tomasz Liskiewicz,Shengwei Shi
MXenes show great potential in energy storage due to their excellent conductivity, abundant surface groups and adjustable interlayer spacing. Amino modification is an effective strategy to improve electrochemical properties of MXene. However, the selection of amino source is still a key issue. Herein, the amino modification of Ti 3 C 2 MXenes for high-performance supercapacitors has been investigated. The structure and electrochemical properties of Ti 3 C 2 are modified by different amino sources, such as ethylenediamine (EDA), monoethanolamine (MEA) and hydrazine monohydrate (HM). EDA ensures Ti 3 C 2 the largest interlayer spacing (13.96 Å) and highest specific surface area (52.2 m 2 g −1 ). In addition, there are more functional groups in EDA-modified Ti 3 C 2 (EDA-Ti 3 C 2 ) resulted from the stronger electron-donating nature of EDA than HM and MEA. Thus, EDA-Ti 3 C 2 exhibits the largest specific capacitance of 683 F g −1 in 1 M H 2 SO 4 electrolyte at 2 mV/s, and the capacitance maintains 97.3 % of the original after 10,000 cycles at 50 mV/s. As a comparison, MEA-Ti 3 C 2 and HM-Ti 3 C 2 show specific capacitances of 553 F g −1 and 470 F g −1 , respectively. Furthermore, the symmetric supercapacitor based on EDA-Ti 3 C 2 electrode achieves maximum energy density of 7.87 W h kg −1 at power density of 600 W Kg −1 , and the energy density still remains at 6.34 W h Kg −1 even at an increased power density of 3000 W Kg −1 . This study proposes a simple strategy to enhance electrochemical properties of MXene by amino modification, providing valuable insights for high-performance supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yuzhu Shi,Juanqin Xue,Yongqi Yu,Guangdong Wu,Changbin Tang
For the purpose of making high-value use of Chinese medicine waste, the preparation of derived biochar was studied and used as an electrode for supercapacitors (SCs). High-temperature KOH activation was used to convert the seed shells of discarded traditional Chinese medicine (Mubiezi) into graded porous carbon electrode materials, and the optimal electrode (MCSSAC-3) was obtained by optimizing the KOH addition ratio in this work. The MCSSAC-3 electrode obtained has a high specific surface area (1288.55 m2 g–1) and significantly higher specific capacitance of 302.29 F g–1 at 0.5 A g–1. The MCSSAC-3//MCSSAC-3 symmetric device has a high energy density of 11.13 Wh kg–1 at a power density of 350 W kg–1. In addition, even after 10,000 consecutive cycles, the MCSSAC-3//MCSSAC-3 symmetric device exhibits ideal capacitance retention of 87.16% at 10 A g–1. This work offers an approach for the preparation of low-cost and high-performance SCs carbon-based electrodes from discarded traditional Chinese medicine.
研究领域:
材料科学
·
环境科学
·
中医药学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Junwei Feng,Xuanting Wu,Said Amzil,Min Li,Xingchen Liu,Ming Yang,Tingting Yan,Peter Müller-Buschbaum,Ya-Jun Cheng,Jie Gao,Yonggao Xia
Silicon–carbon (Si/C) composites hold great promise as substitutes for conventional graphite anodes in high-specific-energy lithium-ion batteries (LIBs). However, their performance is hindered by silicon’s substantial volume expansion during cycling, which can lead to electrode degradation. Traditional poly(acrylic acid) (PAA) binders often struggle to maintain electrode integrity under these conditions. To address this challenge, polyether modified polyurethane acrylic (PUMA) is used as physicochemical cocrosslinking polymer. PUMA offers superior mechanical properties, elasticity, and interfacial stability, enabling it to effectively accommodate silicon’s volume changes and prevent electrode fracture. Through a simple preparation process, we used PUMA as a slurry additive in combination with PAA to form a functional composite binder, facilitating the construction of a stable and robust SEI film. This is conducive to alleviating the volume expansion of silicon and ensuring the cycling stability of the electrode. In Si/C450 half-cells, electrodes enhanced by our binder show a remarkable longevity, maintaining 97.26% of their capacity post 200 cycles at 0.5 C. The full cells Si/C450||NCM811 display a notable performance, achieving a capacity retention of 82.10% after 100 cycles at 0.2 C. These findings underscore the potential of our innovative binder design in enhancing the efficacy of silicon-based anodes in high-energy LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Junming Zhang,Yefeng Feng,Junhao Peng,Kaidan Wu,Zuyong Feng,Miao He,Kunhua Wen,Deping Xiong
MXenes, with their metallic conductivity and complex surface chemistry, are emerging as promising newcomers in the field of energy storage materials. In this work, we present innovative iterations of MXene synthesised by phytic acid selective etching and self-assembly, denoted P-MXene, with phytic acid adhered tightly to the surface and increased the interlayer spacing of the MXene, which was beneficial to the embedment/desorption of K + , and etched more active sites. When used as an anode material for potassium ion batteries, P-MXene exhibits superior specific capacity of 135 mAh*g −1 , long-term cycling stability capacity of 128.8 mAh*g −1 and higher rate performance (the final capacity of 110.0 mAh*g −1 ). This transformative development not only establishes a new paradigm for MXene derivatives, but also paves the way for the exploration of high-performance MXene-based energy storage materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）