Nano Research
·
2020
·Vol. 14
·期 7
·2410-2417
·
IF 8.183
Lu Junlin,Li Jien,Wan Jing,Han Xiangyu,Ji Peiyuan,Luo Shuang,Gu Mingxin,Wei Dapeng,Hu Chenguo
Enhancement of supercapacitors (SCs) with high-energy density and high-power density is still a great challenge. In this paper, a facile strategy for in situ anchoring of Co 3 O 4 particles on N doped carbon cloth (pCoNCC) is reported. Due to the interaction of the doped N and Co 3 O 4 , the electrochemical performance improves significantly, reaching 1,940.13 mF·cm −2 at 1 mA·cm −2 and energy density of 172.46 µWh·cm −2 at the power density of 400 µW·cm −2 , much larger than that without N doping electrode of 28.5 mF·cm −2 . An aqueous symmetric supercapacitor (ASSC) assembled by two pCoNCC electrodes achieves a maximum energy density of 447.42 µWh·cm −2 and a highest power density of 8,000 µW·cm −2 . Utilizing such a high-energy storage ASSC, a digital watch and a temperature-humidity detector are powered for nearly 1 and 2 h, respectively. Moreover, the ASSC displays a superb electrochemical stability of 87.7% retention after 10,000 cycles at 40 mA·cm −2 . This work would provide a new sight to enhance active materials performance and be beneficial for the future energy storage and supply systems.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 8
·3414-3422
·
IF 2.7
Di Wang,Deyang Zhang,Binhe Feng,Jinbing Cheng,Zuxue Bai,Zhaorui Wang,Jin Chang,Paul K. Chu,Yang Lu,Yongsong Luo
MXenes have gained significant recognition due to their outstanding electrical conductivity, abundant surface functional groups, and distinctive two-dimensional layered structure. However, restacking of nanoflakes hinders the electrochemical performance of Ti3C2Tx-based supercapacitors. Herein, a Ti3C2Tx/VN composite is fabricated using a one-step in situ nitriding method. The presence of VN within the Ti3C2Tx nanoflakes results in an increased interlayer spacing, providing additional electrochemically active sites for charge storage. In addition, the Ti3C2Tx nanosheets form a continuous metallic skeleton that suppresses the formation of soluble salts from VN during charging and discharging resulting in better cycling stability. As the negative electrode in supercapacitors, Ti3C2Tx/VN demonstrates an outstanding specific capacity of 382.1 F g−1 at a current density of 1 A g−1 and exceptional cycling endurance, retaining 93.5% of its capacity after 5000 cycles. An asymmetric supercapacitor comprising Co3O4 and Ti3C2Tx/VN as the positive and negative electrodes, respectively, shows high energy and power densities of 69.1 W h kg−1 (1 A g−1) and 7.6 kW kg−1 (8 A g−1). The results reveal a promising strategy to design composite anodes with high energy and power densities for supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Guangjun Liu,Fei Zhou,Keling Yan,Changfu Zhuang,Ying Wang,Ce Wang,Di Tian
Recently, MOF derived metal sulfides have drawn much attentions in supercapacitor filed, but its electrochemical performance is limited by their dispersion and stability. Herein, an in situ growth process was designed to fabricate Co 3 S 4 /Ni 3 S 4 on electrospun carbon nanofibers modified by ZIF-67, which offered robust structural stability , high redox activities, and enhanced the electron/ion diffusion kinetics. These merits lead to the specific capacitance of 617.78 F g −1 (specific capacity of 278.00 C g −1 ) at 0.5 A g −1 , good rate performance, as well as long cycling durability for CNF@CoNi(1:4)S in three electrode system . Its charge storage mechanism involved in a combined process of surface and diffusion contribution. In addition, an asymmetric supercapacitor (CNF@CoNi(1:4)S//AC) was constructed with the maximum energy density of 40.54 Wh kg −1 (1 A g −1 ) and the maximum power density of 6788.00 W kg −1 . This device also showed an outstanding cyclic performance (its specific capacitance could maintain the initial 115.10 % after 5000 cycles), and provided enough energy for the emission of LED. This work opens an avenue for designing MOF based or metal sulfides based functional materials .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Chunyu Xu,Xiuyun Zhang,Shining Zhang,Shijie Ren,Yajuan Jiang,Chaoying Wang,Kunpeng Jiang,Guisheng Zhu,Yunyun Zhao,Huarui Xu
Owing to its intrinsic characteristic, biomass activated carbon (AC) extracted from bagasse demonstrates high specific surface area and porous structure, which is widely regarded as a promising substrate to design AC@transition metal compound electrode material. Herein, NiCo 2 S 4 nanosheets uniformly grown on bagasse activated carbon (BAC@NiCo 2 S 4 ) is successfully prepared as composite electrode material for supercapacitors. Owing to the presence of porous BAC substrate with a large specific surface area of 1712.49 m 2 g −1 , the as-prepared BAC@NiCo 2 S 4 composite demonstrates hierarchical structure with a considerable specific surface area of 208.58 m 2 g −1 and good micro-mesoporous characteristic, thereby improving electrical performances with an impressive specific capacity of 2264 F g −1 at 1 A g −1 , and a good rate capability of 77.9 % retention from 1 to 20 A g −1 . Additionally, the as-assembled BAC@NiCo 2 S 4 //BAC asymmetric supercapacitor provides a high energy density of 64.9 W h kg −1 at 800.1 W kg −1 , and maintains 32.4 W h kg −1 when the power density is up to 8000.2 W kg −1 . The above results suggest that the BAC@NiCo 2 S 4 composite is a competitive electrode material in the field of energy storage.
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
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Xuanyuan Ni,Yunxing Zhao,Pengcheng Cai,Qing Xu,Denian Li
Carbon-based capacitor electrodes have the advantages of high capacitance value, superior recyclability, and inexpensive raw materials, which fuel the application of capacitors in large-scale energy storage. Biomass tar is a hazardous waste that can be recycled as a low-cost carbon electrode precursor for capacitors, due to its retaining biomass-based heteroatom. In this study, hierarchically porous carbon with cross-linked structure was fabricated by using a nano-Al 2 O 3 template combined with the KOH activation technique, in which the γ-Al 2 O 3 has a size of only 10 nm with high specific surface area, thus optimizing the pore structure of the carbon material. The resulting optimal material, BTC-0.2-2-800, contains abundant pore structure and extremely high oxygen content, delivers low resistance and excellent rate performance with high specific capacitance of 292.1 F g −1 and 221.7 F g −1 at 1 A g −1 and 20 A g −1 , respectively, in double electric layer supercapacitors (EDLCs). Besides, no significant capacity degradation after 10,000 charging and discharging cycles at 10 A g −1 was found. The two-electrode device prepared using Na 2 SO 4 electrolyte achieves a high energy density of 43.18 Wh kg −1 at the power density of 1000 W kg −1 , which can light up a 2 V LED lamp. Moreover, Zinc-ion hybrid supercapacitor (ZIHSC) fabricated with BTC-0.2-2-800 carbon electrode accounts for the energy densities of 69.82 Wh kg −1 and 49.39 Wh kg −1 at the power densities of 40 W kg −1 and 400 W kg −1 , respectively. This study reveals the great potential of biomass-tar-derived carbon as a high-performance electrode material, which may provide an opportunities for the resource utilization of hazardous wastes.
研究领域:
材料科学
·
能源存储
·
环境工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Jinlu Li,Qin Li,Jie Sun,Yuanyuan Ling,Kai Tao,Lei Han
The design and controlled preparation of hollow and porous metal sulfide arrays are an important issue for electrochemical energy storage and conversion because of their unique structural merits including large surface areas, shortened diffusion paths, and rich reaction sites. Herein, a hollow and porous Co9S8 microplate array (MPA) was successfully fabricated by a facile self-sacrifice template strategy, which involved the uniform growth of a metal–organic framework microplate template on Ni foam (NF) and annealing in air, followed by an anion-exchange reaction with S2– ions. The resulting Co9S8-MPA/NF as a binder-free electrode for a supercapacitor shows a high specific capacitance of 1852 F g–1 (926 C g–1) at 1 A g–1 and an excellent cycling stability (86% retention after 5000 cycles at 20 A g–1). Moreover, a hybrid supercapacitor (HSC) constructed with Co9S8-MPA/NF and activated carbon exhibits an outstanding energy density of 25.49 Wh kg–1 at a high power density of 800 W kg–1 and a long-term stability of 92% capacitance retention after 5000 cycles at 10 A g–1. It is worth noting that the prepared all-solid-state HSC can light a red light-emitting diode for 2 min, proving to be a great practical application prospect. These excellent electrochemical behaviors show that this effective conversion strategy offers more possibilities for the development of high-performance energy storage metal sulfide materials.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 2
·620-632
·
IF 7.059
Guorong Wang,Zhiliang Jin
The combination of large energy density and high power density is the optimized model for supercapacitors. However, due to the sluggish charge transfer and ion diffusion, cobalt-aluminium hydrotalcite (CoAl LDHs) electrode materials currently deliver barely satisfactory performance. Oxygen vacancies have been reported to have positive facilitation to the electrochemical property of the hydrotalcite-like materials. In this work, the proportion of oxygen vacancies in CoAl LDHs was increased by NaBH4 treatment, which improved the electrochemical energy storage performance of pristine CoAl LDHs, while prolonged treatment will damage the internal structure of the material and is not conducive to the improvement of electrochemical performance. Consequently, the acquired CoAl LDHs-0.5 delivers a high specific capacity of 799.2 F g−1 at a current density of 1 A g−1 and maintains 81.1% capacity as the current density up to 20 A g−1, which exhibited higher performance than pristine CoAl LDHs and the most reported CoAl LDH-based materials. Besides, the asymmetric supercapacitor (ASC) was fabricated using CoAl LDHs-0.5 and commercial activated carbon (AC) as the positive and negative electrodes, respectively, which exhibits a maximum energy density of 28.9 W h kg−1 at a power density of 523.5 W kg−1 and retains 73.3% of the initial capacity after 5000 cycles at a current density of 5 A g−1. This work provides an ingenious strategy and builds confidence in the further application of CoAl LDHs in electrode materials of supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Feng Wei,Hanfang Zhang,Jianfeng Wang,Jinglong Zhuang,Yaohui Lv
The introduction of heteroatoms into carbon materials is beneficial for enhancing zinc ion storage capability, and thereby obtaining excellent electrochemical performance. Herein, the N, S co-doped porous carbons (NSPCs) with well-developed pores and massive surface area are synthesized from natural biomass by the synergistic activation strategy of KHCO 3 and Na 2 S 2 O 3 . Accordingly, NSPC K achieves high capacitance (262.7 F g −1 ) and long cycle life (remains 99.3% after 10,000 cycles) in 1 M Zn(CF 3 SO 3 ) 2 aqueous electrolyte for supercapacitor . Impressively, the NSPC cathode presents high discharge capacity of 136.3 mAh g −1 in the voltage window of 0–1.8 V, good rate performance (86.5 mA h g −1 at 20 A g −1 ) and high energy density (122.6 W h kg −1 ) for zinc ion hybrid capacitor (ZHC). Besides, the ZHC delivers long-term life with 0.5% damage after 15,000 cycles. This study may facilitate the design of high-energy and safe electrochemical energy storage devices based on the heteroatom doping carbons and aqueous electrolyte.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Feiyan Shi,Jiajun Li,Jiatong Xiao,Xinyu Zhao,Hongsheng Li,Qingda An,Shangru Zhai,Kai Wang,Li Wei,Yao Tong
The development of advanced energy storage systems, such as rechargeable batteries and supercapacitors (SCs), is one of the great challenges related to energy demand with the rapid development of world economy. Herein, a three-dimensional hierarchical porous lignin-derived carbon/WO 3 (HPC/WO 3 ) was prepared by carbonization and solvothermal process. This electrode material for supercapacitor can be operated at a wide voltage window range of −0.4 V to 1.0 V. More importantly, 3HPC/WO 3 with ultrahigh mass loading (~3.56 mg cm −2 ) has excellent specific capacitance of 432 F g −1 at 0.5 A g −1 and cycling stability of 86.6% after 10,000 cycles at 10 A g −1 . The as-assembled asymmetrical supercapacitor shows an energy density of 34.2 W h kg −1 at a power density of 237 W kg −1 and energy density of 16 W h kg −1 at a power density is 14,300 W kg −1 . A solid-state planar micro-supercapacitor (MSC) was fabricated using HPC/WO 3 nanocomposites. Moreover, the calculated specific capacity of MSC was 20 mF cm −2 in polyvinyl alcohol–sulfuric acid gel electrolyte. Overall, through the reasonable design of HPC/WO 3 nanocomposite materials and the efficient assembly of MSCs, the performance of the device was greatly improved, thus providing a clear strategy for the development of energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 42
·7385-7396
·
IF 3.545
Jiaqi Wang,Yiling Quan,Guoxiang Wang,Dazhi Wang,Jie Xiao,Shiping Gao,Hongfeng Xu,Sa Liu,Li Cui
Metal–organic frameworks (MOFs) have been attracting considerable attention due to their large specific surface area and excellent adjustable voids. A one-step solvothermal method is proposed herein to fabricate 3D hollow cage copper cobalt sulfide CuCo2S4via sulfuration and cation exchange reaction based on MOF ZIF-67. The ternary bimetallic material CuCo2S4 not only retains the spatial structure of ZIF-67 but also adjusts the hierarchical hollow structure by adding a Cu “shell”. The hollow cage CuCo2S4 can typically exhibit large specific surface areas, expose additional electroactive sites, and shorten ion/electron diffusion paths. The physicochemical characteristics are comprehensively determined using basic characterization techniques. As an electrode material for supercapacitors, CuCo2S4 has a high specific capacitance of 1096.27 F g−1 at a current density of 0.5 A g−1. Furthermore, an asymmetric supercapacitor (CuCo2S4//AC ASC) device is assembled to prove the practical applicability, and the energy and power densities, respectively, reached 87.59 W h kg−1 and 399.65 W kg−1 at 0.5 A g−1. This device retains 95.83% capacity over 5000 cycles at a current density of 10 A g−1. The proposed method provides an optional protocol for designing and fabricating electrode materials with superior electrochemical energy storage properties and exceptional cyclic stability, presenting additional options for future energy storage devices.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Menghe Jiang,Ying Wang,Cuili Xiang,Yongjin Zou,Fen Xu,Lixian Sun,Dan Cai,Chua Yong Shen
Supercapacitors are promising environmentally friendly energy storage devices owing to their high-power density, fast charge and discharge rates, long service life, wide applicable temperature range, and green environmental protection. Electrodes largely determine superconductor performance, so it is crucial to develop electrode materials with excellent performance. In this work, Mn x Co y O 4 @MoS 2 composites were obtained by coating flake MoS 2 arrays on spherical Mn x Co y O 4 using hydrothermal and heat treatment methods. At x/y = 1:2, the Mn x Co y O 4 @MoS 2 electrode material exhibited a specific capacitance of 1422 F g −1 at 1 A g −1 , which was higher than that at x/y = 1:1 and 2:1. When assembled into an aqueous asymmetric supercapacitor , the proposed electrode material provided a specific capacitance of 131 F g −1 at 1 A g −1 . The promising cycle life of the electrode material was further illustrated by the fact that capacity retention of 85% was obtained after 5000 cycles, and the device retained a specific power of 794 W kg −1 with 46.58 Wh kg −1 . The proposed electrode material design, therefore, provides new ideas to be used in the development of advanced electrodes.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Qian Xie,Chengjie Lu,Chengjie Yi,Tao Shui,Nosipho Moloto,Jiacheng Liu,Song-Zhu Kure-Chu,Takehiko Hihara,Wei Zhang,ZhengMing Sun
Hydrogel electrolytes have been widely used for constructing flexible electrochemical capacitors. However, the weak interface bonding between hydrogel electrolytes and electrode materials often leads to a deterioration of the electrochemical performance during deformation. Herein, a universal fabrication method utilizing vacuum filtration was developed to ensure a robust electrode–electrolyte interface. By in situ gelation of fibrous membranes, we overcome the hurdle of hydrogel filtration, enabling the construction of ultra-thin all-in-one electrochemical capacitors. This strategy has been demonstrated as a universal platform for constructing paper-like devices with an all-in-one structure that is applicable to a variety of electrochemical energy storage systems, including symmetric supercapacitors, asymmetric supercapacitors, ammonium-ion hybrid capacitors, and zinc-ion hybrid capacitors. Among these, the zinc-ion hybrid capacitors demonstrate a high specific capacitance of 474.1 F g−1 and a high energy density of 41.8 mW h cm−3. Additionally, series-connected electrochemical capacitors can power devices under deformations of bending, folding, and curling, showcasing the potential application of wearable energy storage.
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）