JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2025
·
IF 3
Li Dexin,Miao Peiting,Lei Zhenlong,Luo Heming,Zhang Jianqiang
Transition metal sulfides are promising supercapacitor electrode materials due to their unique electrochemical characteristics. However, their application in energy storage systems is often limited by issues such as agglomeration and a relatively low specific surface area. This study introduces a novel method using the porous organic polymer MMP as a precursor for creating porous carbon, designated as MMPC. Through high-temperature activation, MMPC was developed. Subsequently, the MMPC@CoS 2 composites were prepared via a one-pot hydrothermal technique, with MMPC serving as the substrate. This research explores the relationships between reaction temperature, the MMPC to CoS 2 ratio, and the electrochemical characteristics of the composites. Results indicated that MMPC@CoS2-160-1.5 composites possessed a higher specific surface area and enhanced microporosity in contrast with pure CoS 2 . The specific capacitance of MMPC@CoS2-160-1.5 reached 1056.6 F g −1 at a current density of 1 A g −1 , with a decrease to only 21.8% at a CD of 10 A g −1 . When configured into MMPC@CoS2-160-1.5//MMPC asymmetric supercapacitors, the composites achieved energy densities of 24.1 and 15.8 Wh kg −1 at power densities of 751 and 7675 W kg −1 , separately, maintaining 83.3% capacitance after 5000 charge–discharge cycles at 2 A g −1 . These findings underscore the potential of the MMPC@CoS2-160-1.5 composite as a supercapacitor electrode material. Graphical abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhiling Luo,Bingdong Kou,Yi Wang,Yuting Song,Mingcen Weng,Changhong Liu,Wei Zhang,Luzhuo Chen
Diversity and individuation development of wearable electronics require their power sources to be programmable and customizable. However, how to prepare all-purpose electrodes with high designability and satisfying energy density for power sources is still a serious challenge. Herein, we propose programmable supercapacitors based on novel electrode blocks, which are inspired from toy blocks. Polyaniline/carbon nanotube strip is adopted as electrode block template, where one end of the strip is loaded with capacitive MnO 2 (4.9–12.4 mg cm −2 ) as the cathode head, while the other end is left untreated as the anode head. These two heads are designed with opposite potential windows, forming a 2.5 V asymmetric supercapacitor with a high areal capacitance (679.0 mF cm −2 ). The supercapacitor reaches a remarkable energy density of 513.3 μWh cm −2 , which is further utilized to power a high power-consumption fan and an E-ink display. Finally, the electrode blocks are applied to programmably construct a variety of energy devices, such as high-voltage device, stretchable device, three-dimensional supercapacitor lantern and wirelessly self-charged display system. The concept of general electrode block together with its two-head feature to increase energy density will provide a new route to fabricate programmable power sources for the booming wearable electronics.
研究领域:
材料科学
·
能源技术
·
电子工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Hui Peng,Shuzhen Cui,Xuan Xie,Ganggang Wei,Kanjun Sun,Guofu Ma,Ziqiang Lei
Herein, the novel binary tungsten-molybdenum oxides (W 0.4 Mo 0.6 O 3 ) nanoneedle arrays have been prepared by a facile one-step hydrothermal method without adding any surfactant. The as-prepared W 0.4 Mo 0.6 O 3 nanoneedle arrays can provide abundant exposed reaction active sites and utilize expedite transport channel to facilitate the diffusion of electrolyte ion. Thus, as an electrode for supercapacitor , it exhibits a high specific capacity of 115.7 mAh g −1 at the current density of 1 A g −1 and good rate performance. To achieve the high energy density of supercapacitor, an asymmetric supercapacitor is fabricated by using the W 0.4 Mo 0.6 O 3 nanoneedle arrays as the negative electrode and the polygni multiflori caulis-based honeycomb-like carbon (PMCHC) as the positive electrode, which possesses a high output voltage of 1.5 V and an energy density of 20.2 Wh kg −1 at a high power density of 750.6 W kg −1 , as well as good cycling stability. Such facile synthesis strategy and outstanding electrochemical behaviors imply that the binary metal oxides nanoneedle arrays is a promising electrode material for energy-storage system.
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
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 24
·期 48
·12584-12591
·
IF 5.16
Kai Tao,Xue Han,Qiuhui Cheng,Yujing Yang,Zheng Yang,Qingxiang Ma,Lei Han
Graphical MOF-templated electrode : A porous zinc cobalt sulfide nanosheet array on Ni foam (Zn-Co-S/NF) was constructed by growing 2D zinc/cobalt-based metal–organic framework (Zn/Co-MOF) nanosheets on NF, followed by additional sulfurization (see figure). The Zn-Co-S/NF nanosheet array was used directly as a supercapacitor electrode and showed much better electrochemical performance than zinc cobalt sulfide powder. An asymmetric supercapacitor was assembled from Zn-Co-S/NF and activated carbon electrodes, and its potential for practical application was demonstrated by driving a red LED. Porous ternary metal sulfide integrated electrode materials with abundant electroactive sites and redox reactions are very promising for supercapacitors. Herein, a porous zinc cobalt sulfide nanosheet array on Ni foam (Zn-Co-S/NF) was constructed by facile growth of 2D bimetallic zinc/cobalt-based metal–organic framework (Zn/Co-MOF) nanosheets with leaf-like morphology on NF, followed by additional sulfurization. The Zn-Co-S/NF nanosheet array acted directly as a supercapacitor electrode showing much better electrochemical performance (2354.3 F g −1 and 88.6 % retention over 1000 cycles) when compared with zinc cobalt sulfide powder (355.3 F g −1 and 75.8 % retention over 1000 cycles), which originates from good electrical conductivity and mechanical stability, abundant electroactive sites, and facilitated transportation of electrons and electrolyte ions due to the unique nanosheet array structure. An asymmetric supercapacitor (ASC) device assembled from Zn-Co-S/NF and activated carbon electrodes can deliver a highest energy density of 31.9 Wh kg −1 and a maximum power density of 8.5 kW kg −1 . Most importantly, this ASC also shows good cycling stability (71.0 % retention over 10000 cycles). Furthermore, a red LED can be powered by two connected ASCs, and thus as-synthesized Zn-Co-S/NF has great potential for practical applications.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenhao Peng,Xin Min,Shiping Luo,Aijuan Xie
Transition metal oxides (TMOs) and sulfides (TMSs) have garnered significant attention as promising electrode materials for supercapacitors due to their complementary properties, including high conductivity, abundant active sites, and structural stability. The rational design and facile synthesis of TMO-TMS hybrid materials with unique architectures are critical to achieving high-performance energy storage devices. This study presents a novel CuMn 2 O 4 @CuMn 2 S 4 core-shell nanostructure developed on a nickel foam substrate through hydrothermal and sulfurization processes. The CuMn 2 O 4 core offers robust structural support and high conductivity, while the CuMn 2 S 4 shell enhances electrochemical activity and ion diffusion. The synthesized material, CuMn 2 O 4 @CuMn 2 S 4 NF-2, achieved a specific capacitance of 760.5 F·g −1 at 1.0 A·g −1 , demonstrating superior electron transfer resistance ( R ct =2.06 Ω) and excellent cycling stability, retaining 85.2 % of capacitance after 5000 cycles. Furthermore, an asymmetric supercapacitor (ASC) with CuMn 2 O 4 @CuMn 2 S 4 NF-2 as the positive electrode and activated carbon as the negative electrode delivered a maximum energy density of 35.31 Wh·kg −1 at a power density of 750 W·kg −1 and retained 75.5 % capacitance after 5000 cycles. This study underscores the significant potential of integrating oxide and sulfide materials in a single architecture, offering a promising pathway for designing high-performance energy storage systems that capitalize on the synergistic properties of both material types.
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 Energy Storage
·
2021
·
IF 6.583
Siyu Mei,Jian Zheng,Wei Chu
Hybrid supercapacitors, due to the synergistic effect of each composition, show higher specific capacitance and improved cycle stability compared with most traditional supercapacitors. In this work, multicomponent compound NiCo pyrophosphate/nitrogen doped carbon (NiCoPN/C) is elaborately designed and applied as the electrode for hybrid supercapacitors. The obtained sample possesses a hierarchically porous structure with surface area of up to 341.7 m 2 g −1 . In the electrochemical test, the sample gives a specific capacitance of 1240 F g −1 at the current density of 1 A g −1 . The asymmetric supercapacitor NiCoPN/C-5//AC exhibits a high specific energy of 44.68 W h kg −1 when specific power is 715 W kg −1 . After 10000 cycles, the specific capacitance retention of the capacitor remains at 83.7%.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Shuai-Qi Li,Li Liu,Jing Liang,Yu Feng,Chang-Zhong Jiang,Wei Wu
High-performance electrode materials are required for next-generation supercapacitors to satisfy the growing request for higher energy density and cycling stability. In this work, Mn 2+ ions are doped into CoSnO 3 nanocubes by facile ion-exchange method to achieve enhanced pseudocapacitive performance. The doping amount of Mn 2+ ions is controlled by using different reaction times. Compared with pure CoSnO 3 , the resultant Mn 2+ -doped CoSnO 3 exhibits about 3-fold growth in specific capacitance (from 191 F g −1 to 564 F g −1 ) and significantly elevated cycling stability (from 84.1% to 104.7% in terms of capacitance retention). Furthermore, symmetric supercapacitors (SSCs) based on CoSnO 3 and Mn 2+ -doped CoSnO 3 with multifarious patterns are fabricated by cost-effective screen printing method. Mn 2+ -doped CoSnO 3 SSC shows boosted areal capacitance, enlarged energy density and better cycling stability compared with CoSnO 3 SSC, which can be series connected to power a red light emitting diode (1.9 V). These results prove the feasibility of Mn 2+ doping with ion-exchange method to enhance the pseudocapacitive performance of the supercapacitor electrode materials.
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
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 69
·16392-16401
·
IF 4.857
Chenxia Kang,Ju Fang,Likang Fu,Shuxian Li,Qiming Liu
Graphical Supercapacitive nanoarchitectures : A rationally designed 3D hierarchical carbon cloth/nitrogen-doped carbon nanowires/Ni@MnO 2 (CC/N-CNWs/Ni@MnO 2 ) nanocomposite was prepared by electrodeposition and used as a supercapacitor cathode exhibiting high surface area, outstanding electrical conductivity, and excellent performance in supercapacitors. A 3D hierarchical carbon cloth/nitrogen-doped carbon nanowires/Ni@MnO 2 (CC/N-CNWs/Ni@MnO 2 ) nanocomposite electrode was rationally designed and prepared by electrodeposition. The N-CNWs derived from polypyrrole (PPy) nanowires on the carbon cloth have an open framework structure, which greatly increases the contact area between the electrode and electrolyte and provides short diffusion paths. The incorporation of the Ni layer between the N-CNWs and MnO 2 is beneficial for significantly enhancing the electrical conductivity and boosting fast charge transfer as well as improving the charge-collection capacity. Thus, the as-prepared 3D hierarchical CC/N-CNWs/Ni@MnO 2 electrode exhibits a higher specific capacitance of 571.4 F g −1 compared with those of CC/N-CNWs@MnO 2 (311 F g −1 ), CC/Ni@MnO 2 (196.6 F g −1 ), and CC@MnO 2 (186.1 F g −1 ) at 1 A g −1 and remarkable rate capability (367.5 F g −1 at 10 A g −1 ). Moreover, asymmetric supercapacitors constructed with CC/N-CNWs/Ni@MnO 2 as cathode material and activated carbon as anode material deliver an impressive energy density of 36.4 W h kg −1 at a power density of 900 W kg −1 and a good cycling life (72.8 % capacitance retention after 3500 cycles). This study paves a low-cost and simple way to design a hierarchical nanocomposite electrode with large surface area and superior electrical conductivity, which has wide application prospects in high-performance supercapacitors.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Na Lei,Yin Qiao,Guanfu Liu,Renhao Xu,Guohua Jiang,Muslum Demir,Pianpian Ma
Cobalt-based perovskite SrCo 0.875 Nb 0.125 O 3 is an advantageous electrode material for supercapacitors . However, the particle form of SrCo 0.875 Nb 0.125 O 3 is not conducive to the electrochemical behavior. Based on this, surface MnO 2 modified SrCo 0.875 Nb 0.125 O 3 on carbon cloth (MnO 2 @SrCo 0.875 Nb 0.125 O 3 @CC) has been prepared as supercapacitor electrode. The dandelion-like morphology of MnO 2 significantly increases the specific surface area and inhibits the grain agglomeration of SrCo 0.875 Nb 0.125 O 3 , thus promoting the ion diffusion during the electrochemical process. As a result, the electrochemical performance of the composite is significantly optimized due to the synergistic effect of SrCo 0.875 Nb 0.125 O 3 and MnO 2 . The MnO 2 @SrCo 0.875 Nb 0.125 O 3 @CC electrode yields an ultra-high specific capacitance of 2066.0 mF cm −2 at 2 mA cm −2 current density. Compared with SrCo 0.875 Nb 0.125 O 3 @CC electrode and MnO 2 @CC electrode, this work provides a much improved performance. Besides, an asymmetric supercapacitor composed of MnO 2 @ SrCo 0.875 Nb 0.125 O 3 @CC as positive electrode and CuS@CC as negative electrode exhibits a voltage window of 1.8 V and a specific capacitance of 114.6 mF cm −2 when the current density is 3 mA cm −2 . A high energy density of 51.57 μ Wh cm −2 is achieved at a power density of 4.86 mW cm −2 for the device.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2023
·
IF 5.8
Song Wei,Caichao Wan,Xingong Li,Jiahui Su,Wenjie Cheng,Huayun Chai,Yiqiang Wu
Summary Traditional electrode materials still face vital challenges of few active sites, low porosity, complex synthesis process, and low specific capacitance. Herein, N-doped and 3D hierarchical porous graphene nanofoam (N-GNF) is created on carbon fibers (CFs) by employing a facile, fast, and environmentally friendly strategy of N 2 plasma activation. After an appropriated N 2 plasma activation, the graphene nanosheets (GNSs) synthesized by Ar/CH 4 plasma deposition transform into N-GNF successfully. N doping donates rich active sites and increases the hydrophilia, while hierarchical nanoarchitecture exposes an enlarged effective contact area at the interface between electrode and electrolyte and affords sufficient space for accommodating more electrolytes. The as-assembled flexible N-GNF@CFs//Zn NSs@CFs Zn ion capacitor delivered a high energy density of 105.2 Wh kg −1 at 378.6 W kg −1 and initial capacity retention of 87.9% at the current of 2 A g −1 after a long cycle of 10,000.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yi Cao,Piao Ruan,YuFeng Xue,Yue Cao,Huang He,Wenfeng Qiu
Nowadays, materials that possess high activity and natural oxygen vacancy have garnered significant attention as potential electrode materials for supercapacitors . In this study, we successfully prepared the Hf 6 Ta 2 O 17 (HTO) nanofibres (NFs) with an orthorhombic superlattice structure using the electrospinning technique and sintering process. The characterization results indicate that the HTO NFs synthesized at 750 °C show good micro nanostructures and outstanding electrochemical properties . To enhance its energy storage performance, additional oxygen vacancies (OVs) were introduced through a carbothermal treatment under an Ar atmosphere. Although longer reduction reaction times can produce more OVs, the integration of grain boundaries and the growth of grain size caused by large annealing times may limit its electrochemical performance. Therefore, the HTO NFs treated for 1 h (HTO/C-1) exhibited the maximum C s of 925 F·g −1 at 1 A·g −1 with a larger voltage window of 2.1 V. Furthermore, a symmetric supercapacitor fabricated by two reduced HTO NFs electrodes and 1 M Na 2 SO 4 solution, recorded as r-HTO NFs//r-HTO NFs. The device demonstrated excellent energy density of 73.3 Wh·kg −1 (at power density of 1050 W·kg −1 ) and a long cycling life (81.8% retained after 5000 cycles). These results suggest that the optimized reduction process can provide appropriate oxygen vacancies in HTO NFs, thereby effectively enhancing its performance.
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 COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Qianqian Zhang,Shirui Wang,Yuling Lan,Jianping Deng,Mizi Fan,Guanben Du,Weigang Zhao
Enhancing the performance of layered nickel–cobalt double hydroxides (NiCo-LDH) as electrode materials for supercapacitors represents a promising strategy for optimizing energy storage systems. However, the complexity of the preparation method for electrode materials with enhanced electrochemical performance and the inherent defects of nickel–cobalt LDH remain formidable challenges. In this study, we synthesized acetate-ion-intercalated NiCo-LDH (NCLA) through a simple one-step hydrothermal method. The physical and chemical structural properties and supercapacitor characteristics of the as-prepared NCLA were systematically characterized. The results indicated that the introduction of Ac − engendered a distinctive tetragonal crystal structure in NiCo-LDH, concomitant with a reduced interlayer spacing, thus enhancing structural stability. Electrochemical measurements revealed that NCLA-8 exhibited a specific capacitance of 1032.2 F g −1 at a current density of 1 A g −1 and a high specific capacitance of 922 F g −1 at 10 A g −1 , demonstrating a rate performance of 89.3%. Furthermore, NCLA-8 was used to construct the positive electrode of an asymmetric supercapacitor, while the negative electrode was composed of activated carbon. This configuration resulted in an energy density of 67.7 Wh kg −1 at a power density of 800 W kg −1 . Remarkably, the asymmetric supercapacitor retained 82.8% of its initial capacitance following 3000 charge–discharge cycles at a current density of 10 A g −1 . Thus, this study demonstrates the efficacy of acetate-ion intercalation in enhancing the electrochemical performance of NiCo-LDH, establishing it as a viable electrode material for supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）