APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ziqian Ma,Zhiqin Sun,He Jiang,Fuzhi Li,Qian Wang,Fengyu Qu
The intertwined fiber structure is advantageous as a structure of supercapacitor electrode material. In this paper, the NiCo 2 S 4 embedded in carbon fiber (NiCo 2 S 4 /CF) has been prepared through hydrothermal vulcanization of electrospun NiCo 2 O 4 /carbon nanofibers precursor. It is a simple way to integrate the pseudocapacitive material with carbon, rendering high capacitance (1169 F g −1 at 1 A g −1 ), excellent rate capability (81.3% at 20 A g −1 ) and superior cycle stability (87.2% capacitance retention after 10,000 cycles). Afterwards, an all-solid-state asymmetric supercapacitor device (ASC) has been prepared with the NiCo 2 S 4 /CF positive electrode and porous carbon nanofiber negative electrode. When the power density of ASC is 878.3 W kg −1 , the energy density can reach 28.8 Wh kg −1 with excellent cycle stability.
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
Advanced Sustainable Systems
·
2019
·Vol. 3
·期 5
·1800167
·
IF 0
Muhammad Sohail Riaz,Xiaotao Yuan,Yantao Zhao,Chenlong Dong,Shuying Nong,Zeeshan Ali,Fuqiang Huang
Innovative nano/microarchitectures, owing to their promising catalytic features, such as abundant active sites, high surface area, and enhanced ion transport, are ideal for oxygen electrocatalysis. Herein, an inventive approach is put forward to fabricate ternary metal sulfide hollow microcubes by a hydrothermal method between spherical porous ZnO with transition metal cations in the presence of urea followed by etching and sulfurization. The significant electrocatalytic activity toward oxygen evolution reaction (OER) with onset potential of 1.48 V (vs reversible hydrogen electrode (RHE)) is obsereved. The objective material shows an overpotential of 320 mV, to achieve a current density of 10 mA cm −2 for OER and excellent robustness with slight variation in potential after long-term chronopotentiometry test for 12 h. As expected, the material also exhibits oxygen reduction reaction (ORR) activity with a half wave potential of 0.8 V (vs RHE) and limited current density of 5.1 mA cm −2 . Meanwhile, further investigations confirm the near four-electron transport pathways for ORR. Such up-bottom etching followed by sulfurization method provide a new concept for engineering porous electrocatalysts.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
RARE METALS
·
2023
·Vol. 42
·期 8
·2643-2657
·
IF 8.8
Yuan Kai,Gao Teng-Jia,Yang Yang,Luo Wang,Li Shun,Zhang Chao-Yang,Xu Jian-Xiong,Li Na,Zhu Yi-Rong
Binary transition metal sulfides are hotly investigated in advanced energy storage devices because of their ultra-high reversible capacity. Nevertheless, the unsatisfied rate capability and cycling stability still hinder their practical application. Herein, hierarchical nanoporous carbon@NiCo 2 S 4 (HNCMs@NCS) composites with core–shell flower-like structures were prepared by in situ growing of NiCo 2 S 4 nanosheets on HNCMs through a hydrothermal-assisted template sacrificial method. Benefiting from a synergistic effect between the NiCo 2 S 4 shell with high specific capacity and the HNCMs with unique porous structure, the synthesized flower-like HNCMs@NCS composites exhibit extraordinary electrochemical performances, including a high capacity of 346.9 mAh·g −1 at 1 A·g −1 , superb rate property with 86.4% initial capacity at 30 A·g −1 and predominant cycle stability with 81.2% capacity retention after 5000 cycles. Furthermore, the resulting HNCMs@NCS cathode was coupled with the chemical-activated HNCMs (AHNCMs) anode to construct a hybrid supercapacitor device. The as-fabricated device exhibits superior energy density (49.9 Wh·kg −1 at 802 W·kg −1 ) and ultra-high power density (24 kW·kg −1 at 29.5 Wh·kg −1 ). This fascinating result further demonstrates the tremendous prospect of the synthesized HNCMs@NCS composites as high-performance supercapacitor electrode materials.
Graphical Abstract
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
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Xiao Mi,Hui Xinyu,Yang Songyi,Du Xinyue,Gao Xiaofan,Song Zhuoyuan,Zhang Weixi,Xiao Meng
Supercapacitor (SC) electrodes with excellent capacity and multiplicity performance have been in demand for a long time. In this paper, CeO 2 /Co 3 O 4 nanorod arrays were firstly synthesized by hydrothermal method and thermal treatments, and then NiCo 2 S 4 were successfully wrapped around CeO 2 /Co 3 O 4 nanorod arrays by electrodeposition. On the one hand, the CeO 2 /Co 3 O 4 nanorod arrays acted as a core layer to provide a scaffold for the continuous and stable conductivity of the electrochemical reaction, while on the other hand, the NiCo 2 S 4 played an important role in increasing the capacity due to their high conductivity. The electrochemical properties of NiCo 2 S 4 @ CeO 2 /Co 3 O 4 electrode materials were remarkable improvement due to the synergistic and complementary effect. The area capacitance of the prepared NiCo 2 S 4 @ CeO 2 /Co 3 O 4 nanorod arrays was 1576.67 mF cm −2 with a current density of 1 mA cm −2 . And the intrinsic and transfer resistances of the composites were 0.816 Ω and 0.064 Ω. Meanwhile, the asymmetrical supercapacitors exhibited excellent energy density (0.074 mWh cm −2 ) with the power density of 0.805 mW cm −2 . The capacitive retention rate after 5000 cycles was 93.25%. This study demonstrates that the 3D core–shell structure of NiCo 2 S 4 @ CeO 2 /Co 3 O 4 nanorod arrays has a good practical application potential in supercapacitor devices.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Tingting Feng,Haoyu Jiao,Huilan Li,Junchao Wang,Shu Zhang,Mengqiang Wu
To exploit an efficient supercapacitor, improving the comprehensive properties of electrode materials has become an important goal. In this work, NiCo2S4 nanosheets were successfully combined with highly conductive carboxylated carbon nanotubes (CNT-h-COOH) by electrochemical deposition, forming an interconnected porous network of NiCo2S4 nanosheets/CNT composite on the nickel foam. The results showed that the deposition potential and time played important roles to influence the morphology and electrochemical performance of NiCo2S4 nanosheets/CNT composite. It turned out that the NiCo2S4/CNT composite prepared by depositing at a −0.9 V for 10 min presented excellent specific capacity at 1 A g–1 (2498.12 F g–1), outstanding rate characteristic at 100 A g–1 (compared with 1 A g–1, the capacitance retention was 61.1%), and exceptional cycle performance at 20 A g–1 (the capacitance retention rate after 10 000 charge/discharge cycles was 96.08%). Further, the flexible asymmetric supercapacitor (ASC) with a poly(vinyl alcohol) (PVA)/KOH gel electrolyte was obtained using commercial activated carbon as the anode and the NiCo2S4/CNT composite as the cathode. The ASC showed a high specific capacity of 215.06 F g–1 at 0.25 A g–1, an exceptional capacitance retention rate of 89.03% after 10 000 cycles, an outstanding energy density of 76.47 Wh kg–1 at 201.01 W kg–1, and excellent flexibility. Thereby, our study demonstrated that the electrodeposited porous NiCo2S4/CNT composite possesses a broad potential application in the area 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
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 29
·295705
·
IF 3.874
Fangya Qi,Han Li,Fan Yang,Zhipeng Sun
An integrated electrode of core–shell coaxially structured NiCo2S4@TiO2 nanorod arrays/carbon cloth (NiCo2S4@TiO2@CC) have been fabricated, via a two-step hydrothermal method. Comprehensive structural and compositional analyzes are performed to understand the effects of the NiCo2S4 shell on the TiO2 core. Such core–shell arrays structure can significantly provide abundant electroactive sites for redox reactions, convenient ion transport paths, and favorable structure stability. The NiCo2S4@TiO2@CC electrode represents a splendid specific capacitance (650 F g−1 at 1 A g−1) and enhanced cycling stability (capacitance retention of 97% over 10 000 cycles at 5 A g−1). Additionally, the assembled NiCo2S4@TiO2@CC//CNT@CC solid-state asymmetric supercapacitors exhibit a maximal energy density of 0.6 mWh cm−3 at 32.4 W cm−3, and topping cycling stability (85% capacitance retention after 5000 cycles at 5 mA cm−2). The results demonstrate that the well-designed NiCo2S4@TiO2@CC presented in this work are applicable for the development of electrode materials in energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jintang Zhou,Yijie Liu,Congyu Zhou,Weize Wang,Lvtong Duan,Yucheng Wang,Zhengjun Yao
The modern and complex environment requires microwave absorbing materials (MAMs) that can cope with environmental changes. In particular, the high humidity, high salt spray and high temperature of the marine environment conditions have been the toughest. Consequently, the development of integrated materials with both microwave absorption (MA) and corrosion resistance has emerged as a top priority. In this work, spherical NiCo 2 S 4 (NCS) particles with stable size were prepared by a simple solvothermal method. Furthermore, the self-polymerization of dopamine (PDA) on the surface of NCS was achieved by exploiting the film-forming ease of dopamine. A series of PDA-NCS particles with different interfaces were fabricated by tuning the ratio of NCS and dopamine. The integrated magneto-electric drive synergy enhances the impedance matching. Multiple heterogeneous interfaces enhance the depletion efficiency of electromagnetic waves (EMWs) within the material. The samples designed have achieved an effective absorption bandwidth (EAB) value of 6.26 GHz and a maximum reflection loss value of −22 dB at a low thickness of 1.7 mm. Meanwhile, due to the electrochemical protection reaction of anode of metal and the passivation effect of barrier by PDA. The prepared coatings maintained favorable corrosion resistance in 240 h of continuous salt spray environment. Moreover, after the 240 h salt spray experiment, the sample realized the EAB value of 4.77 GHz at a thickness of 1.7 mm. This work breaks new ground for the development of absorbing and anti-corrosion integrated materials.
研究领域:
材料科学
·
电磁学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hanhan Lv,Daniel K. Macharia,Lisha Zhang,Nuo Yu,Yi Zhang,Yumei Zhang,Zhigang Chen,Seeram Ramakrishna
The development of efficient photocatalysts for solar-driven hydrogen production is crucial for addressing energy and environmental challenges. Herein, a full-spectrum responsive “dual-engine” photocatalytic system based on a multifunctional cocatalyst featuring electrons extraction, photothermal heating effect and abundant active sites was successfully designed. In this system, hierarchical NiCo 2 S 4 (NCS)/defective ZnCdS (ZCS-Vs) composite photocatalysts were synthesized through a simple physical mixing method with hierarchical NCS modified ZCS-Vs nanoparticles. Owing to the introduction of black hierarchical NCS, these composite photocatalysts show a wide light absorption range from 300 to 1200 nm due to the introduction of black hierarchical NCS. Under broad-spectrum illumination, the optimized photocatalyst delivered a maximum H 2 production rate of 22.19 mmol·g −1 ·h −1 and an apparent quantum yield of 6.29 % at 420 nm, corresponding to roughly a 42-fold improvement over pure ZCS-Vs. This outstanding H 2 evolution performance originates from three key factors. First, the metallic nature and high work function of NCS enable the formation of a Schottky junction with ZCS-Vs, which efficiently extracts photogenerated electrons from ZCS-Vs for the reduction of H + ions. Second, under photoexcitation, NCS exhibits a strong localized surface plasmon resonance (LSPR) effect, leading to a rapid increase in local temperature on the catalyst surface. This localized heating further elevates the overall reaction solution temperature, thereby reducing the energy barrier for photocatalytic H 2 evolution. Third, 3D hierarchical structure of NCS not only inhibits nanoparticle aggregation and provides abundant active sites, but also enhances light harvesting through internal scattering, thereby maximizing both charge separation and photothermal efficiency. Consequently, this “dual-engine” photocatalytic system provides a feasible pathway for designing photothermal-assisted composite photocatalysts to enhance photocatalytic H 2 evolution efficiency.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Du Huang,Zhenya Lu,Xingyue Liu,Junning Gao,Zhiwu Chen,Xin Wang,Xiaoyi Fu
NiCo 2 O 4 nanoflowers with high specific surface area were prepared on nickel foam (NF) by hydrothermal method and used as frameworks for developing cathode and anode of flexible asymmetric supercapacitor. With the unique nanoflower-like NiCo 2 O 4 arrays as skeleton, the NiCo 2 O 4 /Au/MnO 2 cathode was prepared by gold-spraying and electrochemical deposition and the NiCo 2 S 4 /PPy anode was prepared by second-hydrothermal and electro-polymerization. The hierarchical structured electrodes offer sufficient redox sites and adequate channels for accelerating ion and electron transport between electrodes and electrolyte. Moreover, the NiCo 2 S 4 /PPy was first reported as the anode, and its cycling stability (capacitance retention of 86.04 % after 5000 cycles) and specific capacitance (1612.5F/g at 1 A/g). The assembled flexible all-solid-state asymmetric supercapacitor (NiCo 2 O 4 /Au/MnO 2 // NiCo 2 S 4 /PPy) displays a high energy density of 206.37 Wh kg −1 at a power density of 398.57 W kg −1 and an outstanding cyclability (capacitance retention of 83.41 % after 5000 cycles).
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
IONICS
·
2020
·Vol. 27
·期 1
·305-314
·
IF 2.394
He Yi,Liu Lijuan,Tao Shihan,Ye Jing,Wu Jun,Xu Cuiying,Guo Qiaohui
NiCo 2 S 4 nanostructures have been intensively investigated as supercapacitor electrode materials ascribing to its high conductivity and capacity. However, NiCo 2 S 4 -based electrodes suffer inferior cycling durability owing to its structural degradation during the redox process. Herein, NiCo 2 S 4 nanoneedles anchored on the graphitic carbon nanofiber mat (NiCo 2 S 4 /GCN) are synthesized via a two-pot hydrothermal method. The NiCo 2 S 4 /GCN composed of highly conductive graphitic carbon nanofiber (GCN) frameworks ensures the uniform dispersion of NiCo 2 S 4 and accelerate electron/ion transport, and NiCo 2 S 4 with porous and hollow nanostructure facilitates the diffusion of electrolyte. The NiCo 2 S 4 /GCN electrode reveals a high-energy storage capability (1775.2 F g −1 at 10 A g −1 ) and an amazing rate retention (1510.2 F g −1 at 50 A g −1 ). Furthermore, the NiCo 2 S 4 /GCN//active carbon device displays a superior energy density (52.3 W h kg −1 at 358.0 W kg −1 ) and preeminent cycle life (retention 94.7% after 10,000 cycles at 5 A g −1 ), suggesting a promising candidate in supercapacitor applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 3
·1723-1733
·
IF 2.4
Zhao Ji-wei,Wei Zhi-qiang,Wang Can,Zhou Mei-pan,Lu Cheng-gong
The Co-based organic skeleton was combined with graphene oxide (GO) as a precursor, Ni 2+ hydrolysis etching was introduced, and finally, NiCo-LDH/GO was obtained. The final composite electrode material NiCo 2 S 4 /rGO was obtained by high-temperature vulcanization. The introduction of MOFs and rGO significantly increased the specific surface area of the material and made it have excellent electrochemical properties. The specific capacitance of the composite NiCo 2 S 4 /20rGO reaches an astonishing 272.5 mAh g −1 when the current density is 1 A g −1 . In addition, at a large current of 10 A g −1 , the specific capacitance of the material can also reach 139.5 mAh g −1 , and after a long cycle of 5000 cycles at such a current density, the capacity remains at the original 73.2%. With NiCo 2 S 4 /20rGO electrode material as the positive electrode and activated carbon as the negative electrode, the hybrid supercapacitor is assembled. At an energy density of 56.9 Wh kg −1 , its power density reaches an excellent 799 W kg −1 , and it still has a capacity retention rate of 74% at a current density of 10 A g −1 . The excellent properties of composites demonstrated in this work open up new possibilities for high-quality energy storage devices.
研究领域:
材料科学
·
电化学
·
储能
·
纳米技术
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Rui Zhai,Yao Xiao,Tianyi Ding,Yunping Wu,Sheng Chen,Wei Wei
Bimetallic transition metal sulfides (TMSs) hold great promise as electrode materials for supercapacitive energy storage devices compared with their monometallic counterparts. However, it is still necessary to develop efficient synthetic protocols for favorable electrode architecture in order to further improve the electrochemical performance. This study presents a facile and controllable method to construct NiCo 2 S 4 heterostructure based on electrochemically exfoliated graphene with good adhesion, which involves the growth of bimetallic MOF precursor and in-situ conversion into NiCo 2 S 4 nanoparticles . This integrated architecture was found to be efficient for supercapacitive energy storage, as evident by the improved utilization of NiCo 2 S 4 and excellent electrochemical performance including high capacity of 1802.5 F g −1 at 1 A g −1 and good rate capability (86.1% capacity retention at 10 A g −1 ). Additionally, N-doped mesoporous carbon spheres (NMCS) were synthesized by sacrificial template method and used as anode for practical application. Benefiting from good charge balance and compatibility, the assembled EEG@NiCo 2 S 4 //NMCS hybrid supercapacitor (HSC) exhibited outstanding energy density (30.4 Wh kg −1 at 800.0 W kg −1 ) and excellent cycling stability (80.1% capacitance retention after 9000 cycles).
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）