Solvothermal synthesis of cobalt nickel layered double hydroxides with a three-dimensional nano-petal structure for high-performance supercapacitors

2020 ◽  
Vol 4 (1) ◽  
pp. 337-346 ◽  
Author(s):  
Hailiang Chu ◽  
Ying Zhu ◽  
Tingting Fang ◽  
Junqiang Hua ◽  
Shujun Qiu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Solvothermal Synthesis ◽  
High Performance ◽  
Three Dimensional ◽  
Rate Performance ◽  
Supercapacitor Electrode ◽  
Long Term Stability ◽  
Cobalt Nickel ◽  
Double Hydroxides

CoNi LDH-6 with a nano-petal structure was prepared, which exhibited excellent rate performance and long-term stability as a supercapacitor electrode.

A few-layered MoS2 nanosheets/nitrogen-doped graphene 3D aerogel as a high performance and long-term stability supercapacitor electrode

Nanoscale ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 4318-4327 ◽  
Author(s):  
Yue Yuan ◽  
Haipeng Lv ◽  
Qunjie Xu ◽  
Haimei Liu ◽  
YongGang Wang
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Mos2 Nanosheets ◽  
Supercapacitor Electrode ◽  
Nitrogen Doped ◽  
Long Term Stability ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Layered Mos2

Few-layered MoS2 nanosheets form hybrids with nitrogen-doped graphene to construct a three-dimensional aerogel and demonstrate greatly enhanced capacitance and long cycling life as a supercapacitor electrode.

scholarly journals Ni3+ doped cobalt–nickel layered double hydroxides as high-performance electrode materials for supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (77) ◽  
pp. 49010-49014 ◽  
Author(s):  
H. M. Sun ◽  
Y. X. Ye ◽  
Z. F. Tian ◽  
S. L. Wu ◽  
J. Liu ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Layered Double Hydroxides ◽  
High Performance ◽  
Electrode Materials ◽  
High Rate ◽  
Supercapacitor Electrode ◽  
Cobalt Nickel ◽  
Supercapacitor Electrode Materials ◽  
Double Hydroxides ◽  
Good Cycling Stability

Ni3+ doped Co0.55Ni0.45-LDHs present a high rate specific capacitance and good cycling stability as supercapacitor electrode materials.

scholarly journals Bioinspired nano-ordered liquid membrane for precise molecular separation

2020 ◽  
Author(s):  
Haozhen Dou ◽  
Mi Xu ◽  
Baoyu Wang ◽  
Zhen Zhang ◽  
Guobin Wen ◽  
...  
Keyword(s):  
Self Assembly ◽  
High Performance ◽  
Liquid Membrane ◽  
Three Dimensional ◽  
Cellular Membrane ◽  
Liquid Structure ◽  
Long Term Stability ◽  
Separation Membranes ◽  
Molecular Separation

Abstract Cellular membranes provide ideal archetypes for molecule or ion separations with sub-angstrom scale precision, which are featured with both extremely high permeability and selectivity due to the well-defined membrane protein channels. However, the development of bioinspired membranes with artificial channels for sub-angstrom scale ethylene/ethane (0.416 nm / 0.443 nm) separation remains an uncharted territory and a significant challenge. Herein, a bioinspired nano-ordered liquid membrane is constructed by a facile ion/molecule self-assembly strategy for highly efficient ethylene/ethane separation, which mimics the structure of cellular membrane elegantly and possesses plenty of three-dimensional (3D) nanochannels. The elaborate regulation of non-covalent interactions by optimizing the ion/molecule compositions within membrane confers the nano-ordered liquid structure with interpenetrating and bi-continuous apolar domains and polar domains, which results in the formation of regular carrier wires and enormous 3D interconnected ethylene transport nanochannels. By virtue of these 3D nanochannels, the bioinspired nano-ordered liquid membrane manifests simultaneously super-high selectivity, excellent permeance and long-term stability, which exceeds previously reported ethylene/ethane separation membranes. This methodology in this work for construction of bioinspired membrane with tunable 3D nanochannels through ion/molecule self-assembly will enlighten the design and development of high-performance separation membranes for angstrom/sub-angstrom scale ion or molecule separations.

Graphene quantum dots–three-dimensional graphene composites for high-performance supercapacitors

2014 ◽  
Vol 16 (36) ◽  
pp. 19307-19313 ◽  
Author(s):  
Qing Chen ◽  
Yue Hu ◽  
Chuangang Hu ◽  
Huhu Cheng ◽  
Zhipan Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Graphene Quantum Dots ◽  
Three Dimensional ◽  
Term Stability ◽  
Long Term Stability

Graphene quantum dots boost the capacitance of the graphene supercapacitor by more than 90% and with an excellent long-term stability.

scholarly journals Nickel Cobalt Hydroxides With Tunable Thin-layer Nanosheets for High-performance Supercapacitor Electrode

2021 ◽  
Author(s):  
Luomeng Zhang ◽  
Hui Xia ◽  
Shaobo Liu ◽  
Yishan Zhou ◽  
Yuefeng Zhao ◽  
...  
Keyword(s):  
Thin Layer ◽  
Specific Capacitance ◽  
Current Density ◽  
Layered Double Hydroxides ◽  
High Performance ◽  
Electrode Materials ◽  
Supercapacitor Electrode ◽  
Nickel Cobalt ◽  
Capacitance Performance ◽  
Double Hydroxides

Abstract Layered double hydroxides as typical supercapacitor electrode materials can perform superior energy storage if the structures are well regulated. In this work, a simple one-step hydrothermal method is used to prepare diverse nickel cobalt layered double hydroxides (NiCo-LDHs), in which the different contents of urea are used to synthesize the different nanostructures of NiCo-LDHs. The results show that the decrease in urea content can effectively improve the dispersibility of NiCo-LDHs, adjust the thickness of materials and optimize the internal pore structures, thereby enhancing the capacitance performance of NiCo-LDHs. When the content of urea is reduced from 0.03 g to 0.0075 g under a fixed precursor materials mass ratio of nickel (0.06 g) to cobalt (0.02 g) of 3:1, the prepared sample NiCo-LDH-1 exhibits the thickness of 1.62 nm, and the clear thin-layer nanosheets structures and a large number of surface pores are formed, which is beneficial to the transmission of ions into the electrode material. After being prepared as a supercapacitor electrode, the NiCo-LDH-1 displays an ultra-high specific capacitance of 3982.5 F g-1 under the current density of 1 A g-1, and high capacitance retention above 93.6% after 1000 cycles of charging and discharging at a high current density of 10 A g-1. The excellent electrochemical performance of NiCo-LDH-1 is proved by assembling two-electrode asymmetric supercapacitor with carbon spheres, displaying the specific capacitance of 95 F g-1 at 1 A g-1 and the capacitance retention with 78% over 1000 cycles. As a result, it offers a facile way to control the nanostructure of NiCo-LDHs, confirms the important affection of urea on enhancing capacitive performance for supercapacitor electrode and provides the high possibility for the development of high-performance supercapacitors.

A three-dimensional graphene aerogel containing solvent-free polyaniline fluid for high performance supercapacitors

Nanoscale ◽  
2017 ◽  
Vol 9 (45) ◽  
pp. 17710-17716 ◽  
Author(s):  
Zhaodongfang Gao ◽  
Junwei Yang ◽  
Jing Huang ◽  
Chuanxi Xiong ◽  
Quanling Yang
Keyword(s):  
Specific Capacitance ◽  
Conducting Polymer ◽  
High Performance ◽  
Three Dimensional ◽  
High Specific Capacitance ◽  
Solvent Free ◽  
Graphene Aerogel ◽  
Term Stability ◽  
Long Term Stability

Conducting polymer based supercapacitors usually suffer from the difficulty of achieving high specific capacitance and good long-term stability simultaneously.

scholarly journals Facile one-pot solvothermal preparation of two-dimensional Ni-based metal–organic framework microsheets as a high-performance supercapacitor material

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 8362-8366
Author(s):  
Zhaohua Li ◽  
Yuan Sun ◽  
Rui Hu ◽  
Shuai Ye ◽  
Jun Song ◽  
...  
Keyword(s):  
High Performance ◽  
Metal Organic Framework ◽  
Two Dimensional ◽  
Supercapacitor Electrode ◽  
One Pot ◽  
Long Term Stability ◽  
Metal Organic ◽  
Solvothermal Preparation ◽  
Organic Framework

Two-dimensional Ni-based metal–organic framework microsheets (Ni-MOFms) were synthesized via a facial one-pot solvothermal approach and exhibited good specific capacities and excellent long-term stability when used for a supercapacitor electrode.

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