JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yijiao Zhang,Yanming Wang,Haiying Huo,Pu Zhang,Xiaoliang Zhang,Hongwei Che,Jingbo Mu,Zhixiao Zhang,Ping Li,Chunxia Wu
A 2D/1D/0D ternary heterostructure was fabricated that combined the accumulative merits of each component to exhibit superior performance through synergistic effects. This study adopted a strategy based on integrating 2D MXene, 1D tubular MnO 2 , and 0D Ag nanospheres into one electrode to obtain a ternary heterogeneous layered structure composite electrode. Utilizing the collaborative and intensive outcomes from MXene, MnO 2 , and Ag, the resulting MXene/MnO 2 /Ag composite electrode achieved an exemplary specific capacitance of 880.8 F g −1 at 2 A g −1 . In this study, an asymmetric supercapacitor (ASC) was developed and fabricated using the MXene/MnO 2 /Ag composite for the anode, commercial activated carbon as the cathode. Consequently, in a two-electrode setup, the resulting devices displayed an admirable specific capacitance of 112.5 F g −1 at 3 A g −1 . After being cycled 5000 times, the device maintained 85.0 % of its original capacitance under charge-discharge conditions. Furthermore, the ASC device demonstrated a pronounced energy density of 39.9 Wh g −1 during cycling with a corresponding power density of 2955.8 W kg −1 . These results showed that the dimensionally combined MXene/MnO 2 /Ag nanoarchitectonic electrodes offered considerable application potential for enhancing energy storage in supercapacitors.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2021
·
IF 4.837
Chenya Ruan,Dongdong Zhu,Jiqiu Qi,Qingkun Meng,Fuxiang Wei,Yaojian Ren,Yanwei Sui,Hao Zhang
Bimetallic transition metal sulfides (TMSs) and MXene are the two kinds of promising candidates as electrode materials for supercapacitors based on different storage mechanisms. However, little work has been performed on their composites. In this paper, Ti 3 C 2 MXene-wrapped CoNi 2 S 4 nanotrees were synthesized controllably using flake ZIF-67 as precursor grown on nickel foam, which was transformed into dendrite CoNi 2 S 4 dendrite in MXene suspension (weak acidic environment). The formation mechanism of CoNi 2 S 4 dendrite was discussed. Ti 3 C 2 MXene-wrapped CoNi 2 S 4 nanotrees delivered very high specific capacity of 933 C g −1 at 1 A g −1 and good rate performance. This is due to that the unique dendrite morphology can provide many exposed electro-active sites and wrapped conductive MXene can facilitate the charge transfer. An asymmetric supercapacitor was assembled using CoNi 2 S 4 /MXene/NF and RGO as positive and negative electrodes, which delivered a high energy density of 30.5 Wh kg −1 without deteriorating its high power density (1587 W kg −1 ). This device can power the clock for 55 minutes, demonstrating its broad practical application potential.
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
RSC Advances
·
2015
·Vol. 5
·期 99
·81474-81481
·
IF 3.84
Chao Gong,Miaoliang Huang,Jinfang Zhang,Min Lai,Leqing Fan,Jianming Lin,Jihuai Wu
Ni0.85Se was in situ grown on Ni foam via a facile hydrothermal process as a high-performance electrode for supercapacitors. The as-obtained Ni0.85Se electrode exhibited excellent electrochemical properties with a higher specific capacitance of 1115 F g−1 (1.34 F cm−2) and remarkable cycling stability (91.7% of the initial capacitance value remained after 1000 cycles). An asymmetric supercapacitor was fabricated successfully based on Ni0.85Se (positive electrode) and activated carbon (negative electrode). The Ni0.85Se//AC ASC can expand the operating voltage as high as 1.6 V, which led to an ultrahigh energy density of 32.2 Wh kg−1 at a power density of 789.6 W kg−1. Further, the ASC had a highlight cycle performance (only 1.7% of CT loss after 2000 cycles), so it holds promise as a potential candidate for energy storage devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jianshan Yang,Yongjin Zou,Sanxia Zhang,Zongliang Yu
Transition metal oxides are widely used as electrode materials for supercapacitors due to their high capacitance and stability. Composite materials comprising two transition metal oxides may exhibit enhanced performance based on the properties of each material. In this study, a two-step hydrothermal method was used to fabricate CoMn 2 O 4 needle clusters loaded with Fe 2 O 3 structures. CoMn 2 O 4 serves as an excellent bimetallic oxide electrode material for supercapacitors and acts as a scaffold for loading Fe 2 O 3 particles, thereby further improving electrochemical performance. CoMn 2 O 4 @Fe 2 O 3 exhibited a high specific capacitance of 760 F g −1 at 1 A g −1 . The CoMn 2 O 4 @Fe 2 O 3 //GO asymmetric supercapacitor achieved a high energy density of 21.3 Wh kg −1 at 4021 W kg −1 and 36.3 Wh kg −1 at 803.4 W kg −1 , with a capacitance retention of 83 % after 10,000 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Lijie Hou,Chao Kong,Zhongai Hu,Yanxia Han,Bowan Wu
Emodin is a natural anthraquinone derivative and contains abundant hydroxyl and carbonyl groups, which has high redox activity. As guest molecules, Emodin molecules were anchored on graphene sheet (GNS) by simple one-step reflux method. In the three-electrode system, the optimal composite electrode material (E@GNS) obtained the high specific capacitance of 338.9 F g −1 at 5 mV s −1 and excellent rate capability in 1 mol L −1 H 2 SO 4 . Finally, an asymmetric supercapacitor (ASC) was fabricated by using E@GNS as negative electrode and Caffeic acid non-covalently modified graphene hydrogel (GH-CFA) as positive electrode, respectively. The device achieved the energy density of 32.8 Wh kg −1 along with power density of 0.8 kW kg −1 , and a light-emitting diode (LED) could be light up by two ASCs in series. To compare with the performance of ASC, we also assembled symmetric supercapacitor based on E@GNS, proving that the good matching of positive and negative electrode materials could make the supercapacitor exhibit the best capacitive performance.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Le-Qing Fan,Fei Pan,Qiu-Mei Tu,Yun Gu,Jian-Ling Huang,Yun-Fang Huang,Ji-Huai Wu
Recently more and more concerns have been paid on ternary metal sulfides for use in supercapacitors because of their better electrochemical performances compared with binary counterparts. In this work, CuCo 2 S 4 nanosheet arrays on Ni foam were prepared by a sequential ion-exchange strategy under hydrothermal conditions, where Co 3 O 4 was converted into Co 4 S 3 by an anion-exchange reaction between Co 3 O 4 and S 2− ions, subsequently the Co 4 S 3 was transformed into CuCo 2 S 4 through a cation-exchange reaction with Cu 2+ ions. The as-prepared CuCo 2 S 4 was characterized by powder X-ray diffraction, high-resolution X-ray photoelectron spectroscopy, field emission scanning electron microscopy and transmission electron microscopy . The CuCo 2 S 4 arrays were composed of interconnected thin nanosheets with thickness of about 10 nm. The CuCo 2 S 4 nanosheet arrays on Ni foam were directly employed as a binder-free electrode showing a high specific capacitance of 3132.7 F g −1 at a current density of 1 A g −1 . Besides, an asymmetric supercapacitor based on this synthesized CuCo 2 S 4 electrode as positive electrode and active carbon as negative electrode can deliver a high energy density of 46.1 Wh kg −1 at a power density of 991.6 W kg −1 , and exhibits good rate capability and cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2017
·Vol. 28
·期 44
·445406
·
IF 3.44
Shijie Wang,Rutao Wang,Yabin Zhang,Li Zhang
Carbon-based supercapacitors have attracted extensive attention as the complement to batteries, owing to their durable lifespan and superiority in high-power-demand fields. However, their widespread use is limited by the low energy storage density; thus, a high-surface-area porous carbon is urgently needed. Herein, a highly porous carbon with a Brunauer–Emmett–Teller specific surface area up to 3643 m2 g−1 has been synthesized by chemical activation of papayas for the first time. This sp2-bonded porous carbon has a continuous three-dimensional network of highly curved, atom-thick walls that form narrow mesopores of 2 ∼ 5 nm in width, which can be systematically tailored with varied activation levels. Two-electrode symmetric supercapacitors constructed by this porous carbon achieve energy density of 8.1 Wh kg−1 in aqueous electrolyte and 65.5 Wh kg−1 in ionic-liquid electrolyte. Furthermore, half-cells (versus Li or Na metal) using this porous carbon as ion sorption cathodes yield high specific capacity, e.g., 51.0 and 39.3 mAh g−1 in Li+ and Na+ based organic electrolyte. These results underline the possibility of obtaining the porous carbon for high-performance carbon-based supercapacitors and ion capacitors in a readily scalable and economical way.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Qipeng Yang,Ru Song,Yameng Wang,Xianlong Hu,Zhiyue Chen,Zhuo Li,Weiqiang Tan
A new electrode material consisting of MOFs (Zr-TAA, TAA: trans-aconitic acid) and MWCNTs was simply synthesized by one-pot reflux method and applied to high-performance supercapacitor. With advantages of improved conductivity and uniform pore-size distribution, the composite material shows enhanced electrochemical performance with a specific capacitance of 562.06 F g −1 and retains almost 100% of its initial capacitance after 1000 cycles when measured in 6 M KOH electrolyte. Furthermore, an asymmetric supercapacitor assembled by Zr-TAA/MWCNTs-6 as positive electrode and carbon cloth as negative electrode exhibits a superior energy density of 17.53 Wh kg −1 at a power density of 902.5 W kg −1 , which demonstrates its great practical value in electrochemical energy storage applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Wenhui Xiong,Zijie Cai,Zihao Wang,Zhongkai Wu,Wencen Mei,Zhizheng Wu,Dingbang Liu,Shiming Yang,Weiping Zhou,Zhenzhi Cheng,Jun Wang,Guangsheng Luo
Multivariate transition metal sulfides and porous nanosheet architectures hold promising potential for applications for the energy-related application. Nevertheless, the addition of polymer binders and conductive agents can adversely affect their electrochemical performance. In this work, we present self-assembled Ni-Co sulfide nanosheet arrays growing on foamed Ni (Ni-Co-S@NF). Ni-Co-S@NF electrode materials are synthesized through the complete sulfidation of interconnected ultrathin nanosheets derived from NiCo layered double hydroxides. The highly conductive nickel foam facilitates electron transfer while the 3D network structure promotes electrolyte diffusion and penetration. Hence, porous Ni-Co-S@NF materials presents the excellent specific capacitance as 1286.6C g −1 in 1 A g −1 and retained 70 % of its original capacity over 5000 charge–discharge cycles. Furthermore, we assemble an asymmetric supercapacitor used active carbon as negative-electrode material and Ni-Co-S@NF as positive-electrode material. This device delivers the specific energy is 74.0 Wh kg −1 and specific power of 850.0 W kg −1 .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2020
·Vol. 10
·期 24
·2001024
·
IF 25.245
Zhaodong Huang,Ao Chen,Funian Mo,Guojin Liang,Xinliang Li,Qi Yang,Ying Guo,Ze Chen,Qing Li,Binbin Dong,Chunyi Zhi
Output voltage and self-discharge rate are two important performance indices for supercapacitors, which have long been overlooked, though these play a very significant role in their practical application. Here, a zinc anode is used to construct a zinc ion hybrid capacitor. Expanded operating voltage of the hybrid capacitor is obtained with novel electrolytes. In addition, significantly improved anti-self-discharge ability is achieved. The phosphorene-based zinc ion capacitor exploiting a “water in salt” electrolyte with a working potential can reach 2.2 V, delivering 214.3 F g −1 after 5000 cycles. The operating voltage is further extended to 2.5 V through the use of an organic solvent as the electrolyte; the solvent is prepared by adding 0.2 m ZnCl 2 into the tetraethylammonium tetrafluoroborate in propylene carbonate (Et 4 NBF 4 /PC) solvent, and it exhibits 105.9 F g −1 even after 9500 cycles. More importantly, the phosphorene-based capacitors possess excellent anti-self-discharge performance. The capacitors retain 76.16% of capacitance after resting for 300 h. The practical application of the zinc ion capacitor is demonstrated through a flexible paper-based printed microcapacitor. It is believed that the developed zinc ion capacitor can effectively resolve the severe self-discharge problem of supercapacitors. Moreover, high-voltage zinc ion capacitors provide more opportunities for the application of supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 37
·374003
·
IF 3.551
Xitong Liang,Dongfeng Xue
Novel electrode materials with desired specific capacitances are needed for supercapacitors. Rare-earth (RE)-based materials are fascinating in the field of catalysis and energy. Herein, a series of hydroxides including La, Ce, Pr and Nd was synthesized via in situ precipitation. Interestingly, only Ce(OH)3 showed a redox peak in both positive and negative ranges. The other RE hydroxides exhibited a redox peak only in the positive range. Therefore, in order to certify that Ce(OH)3 can be used as a negative electrode, symmetrical supercapacitors consisting of Ce(OH)3 as both positive and negative electrodes were assembled, and showed a voltage window of 1.3 V. Moreover, asymmetrical supercapacitors were successfully fabricated, in which the positive electrode was composed of La(OH)3, Pr(OH)3 or Nd(OH)3. These results may pave the way to novel negative electrode materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Batteries-Basel
·
2024
·Vol. 10
·期 7
·230
·
IF 4.6
Qi He,Xiang Wu
Ni3S2is a kind of transition metal sulfide (TMD) with excellent electrical conductivity and electrochemical activity. To further enhance the specific capacity of Ni3S2-based supercapacitors, we synthesize several nanosheet-decorated Ni3S2@NiMo-LDH nanostructures by a combination of hydrothermal and electrodeposition processes. The mesoporous structure provides a large number of electroactive sites, which shortens the charge transfer distance and increases the specific surface area of electrode materials. The assembled asymmetric supercapacitor shows an energy density of 62.8 W h kg−1at 2701.6 W kg−1and long-term cycling stability.
研究领域:
材料科学
·
电化学
✓ 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）