scholarly journals Improved lithium storage capacity and high rate capability of nitrogen-doped graphite-like electrode materials prepared from thermal pyrolysis of graphene quantum dots

2020 ◽  
Vol 354 ◽  
pp. 136642 ◽  
Author(s):  
Siyong Gu ◽  
Tommiejean Christensen ◽  
Chien-Te Hsieh ◽  
Bikash Chandra Mallick ◽  
Yasser Ashraf Gandomi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electrode Materials ◽  
Storage Capacity ◽  
Graphene Quantum Dots ◽  
Rate Capability ◽  
High Rate ◽  
High Rate Capability ◽  
Lithium Storage ◽  
Nitrogen Doped ◽  
Thermal Pyrolysis

Two-dimensional ultrathin ZnCo2O4 nanosheets: general formation and lithium storage application

2015 ◽  
Vol 3 (18) ◽  
pp. 9556-9564 ◽  
Author(s):  
Youqi Zhu ◽  
Chuanbao Cao ◽  
Junting Zhang ◽  
Xingyan Xu
Keyword(s):  
Transition Metal ◽  
Large Scale ◽  
Storage Capacity ◽  
Rate Capability ◽  
High Rate ◽  
Two Dimensional ◽  
High Rate Capability ◽  
Lithium Storage ◽  
Excellent Cycling Stability ◽  
General Method

2D multicomponent transition-metal oxide nanosheets are synthesized on a large scale via a general method. Ultrathin ZnCo2O4 nanosheets exhibit high lithium storage capacity, excellent cycling stability, and good high-rate capability.

Hollow CoP spheres assembled by porous nanosheets as high-rate and ultra-stable electrode for advanced supercapacitors

2021 ◽  
Author(s):  
Li Sun ◽  
Zhenbin Xie ◽  
Aiping Wu ◽  
Chungui Tian ◽  
Dongxu Wang ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Rate Capability ◽  
High Rate ◽  
High Rate Capability ◽  
Porous Nanosheets

The electrode materials with a high rate capability and excellent recycled ability are vitally critical for building the supercapacitors, but it synthesis remains a challenge. Herein, we have constructed the...

scholarly journals Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved Supercapacitors

2019 ◽  
Vol 2019 ◽  
pp. 1-5 ◽  
Author(s):  
Zhen Bi ◽  
Lanyan Huang ◽  
Chaoqun Shang ◽  
Xin Wang ◽  
Guofu Zhou
Keyword(s):  
Quantum Dots ◽  
Volume Change ◽  
Electrode Materials ◽  
Rate Capability ◽  
Carbon Quantum Dots ◽  
High Rate ◽  
Electrochemical Performances ◽  
Tin Sulfide ◽  
Transmission Electron ◽  
Tin Sulfides

Copper tin sulfides (CTSs) have widely been investigated as electrode materials for supercapacitors owing to their high theoretical pseudocapacitances. However, the poor intrinsic conductivity and volume change during redox reactions hindered their electrochemical performances and broad applications. In this study, carbon quantum dots (CQDs) were employed to modify CTSs. The structures and morphologies of obtained materials were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD revealed CTSs were composed of Cu2SnS3 and Cu4SnS4, and TEM suggested the decoration of CQDs on the surface of CTSs. With the decoration of CQDs, CTSs@CQDs showed a remarkable specific capacitance of 856 F·g−1 at 2 mV·s−1 and a high rate capability of 474 F·g−1 at 50 mV·s−1, which were superior to those of CTSs (851 F·g−1 at 2 mV·s−1 and 192 F·g−1 at 50 mV·s−1, respectively). This was mainly ascribed to incorporation of carbon quantum dots, which improved the electrical conductivity and alleviated volume change of CTSs during charge/discharge processes.

Surface modification of Na2Ti3O7 nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability

2019 ◽  
Vol 7 (20) ◽  
pp. 12751-12762 ◽  
Author(s):  
Dezhi Kong ◽  
Ye Wang ◽  
Shaozhuan Huang ◽  
Yew Von Lim ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Graphene Quantum Dots ◽  
Rate Capability ◽  
High Energy ◽  
Sodium Ion ◽  
High Rate ◽  
Sodium Ion Batteries ◽  
High Rate Capability ◽  
Doped Graphene ◽  
High Flexibility ◽  
Power Densities

Highly ordered Na2Ti3O7@N-GQD nanofiber arrays on carbon textiles (CTs) exhibit high flexibility, excellent cycling stability, and high energy/power densities.

Hierarchically porous carbon architectures embedded with hollow nanocapsules for high-performance lithium storage

2015 ◽  
Vol 3 (9) ◽  
pp. 5054-5059 ◽  
Author(s):  
Chang Yu ◽  
Meng Chen ◽  
Xiaoju Li ◽  
Changtai Zhao ◽  
Lianlong He ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Porous Carbon ◽  
High Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Carbon Sphere ◽  
High Rate Capability ◽  
Lithium Storage ◽  
Hierarchically Porous

Hierarchically porous carbon architectures composed of a micro-sized porous carbon sphere matrix embedded with hollow nanocapsules are configured, demonstrating a large capacity and an ultra-high rate capability in lithium ion batteries.

Facile synthesis of MnOx nanoparticles sandwiched between nitrogen-doped carbon plates for lithium ion batteries with stable capacity and high-rate capability

RSC Advances ◽  
2016 ◽  
Vol 6 (23) ◽  
pp. 19522-19530 ◽  
Author(s):  
Xiangyang Zhou ◽  
Tao Bai ◽  
Feng Chen ◽  
JingJing Tang ◽  
Qunchao Liao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
High Rate Capability ◽  
Facile Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

MnOx nanoparticles sandwiched between nitrogen-doped carbon plates architecture (C/MnOx/C) has been successfully synthesized via a step-by-step strategy.

A novel fabrication of nitrogen-containing carbon nanospheres with high rate capability as electrode materials for supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 12034-12042 ◽  
Author(s):  
Hui Peng ◽  
Guofu Ma ◽  
Kanjun Sun ◽  
Jingjing Mu ◽  
Xiaozhong Zhou ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Rate Capability ◽  
High Rate ◽  
Carbon Nanospheres ◽  
High Rate Capability ◽  
Different Temperatures

Nitrogen-containing polyaniline-based carbon nanospheres (C-PANI) with diameters of about 200 nm are prepared through a direct carbonization method using polyaniline (PANI) nanospheres as carbon precursors at different temperatures.

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