A crystalline Cu–Sn–S framework for high-performance lithium storage

2015 ◽  
Vol 3 (38) ◽  
pp. 19410-19416 ◽  
Author(s):  
Lina Nie ◽  
Yu Zhang ◽  
Kaiqi Ye ◽  
Jianyu Han ◽  
Yue Wang ◽  
...  
Keyword(s):  
Current Density ◽  
High Performance ◽  
High Stability ◽  
Three Dimensional ◽  
High Capacity ◽  
Lithium Storage ◽  
A Current

The three-dimensional crystalline (H3O)2(enH2)Cu8Sn3S12 framework exhibits a high capacity of 563 mA h g−1 at a current density of 0.1 A g−1 with high stability.

3D intra-stacked CoO/carbon nanocomposites welded by Ag nanoparticles for high-capacity, reversible lithium storage

Nanoscale ◽  
2015 ◽  
Vol 7 (23) ◽  
pp. 10368-10376 ◽  
Author(s):  
Changju Chae ◽  
Ki Woong Kim ◽  
Sue Jin Kim ◽  
Daehee Lee ◽  
Yejin Jo ◽  
...  
Keyword(s):  
Current Density ◽  
Ag Nanoparticles ◽  
High Capacity ◽  
Irreversible Capacity ◽  
Lithium Storage ◽  
Carbon Nanocomposites ◽  
Capacity Loss ◽  
A Current

We demonstrate 3D intra-stacked CoO/carbon nanocomposites welded by Ag nanoparticles with a capacity of 770 mA h g−1 at a current density of 2 A g−1, by reducing efficiently the irreversible capacity loss.

scholarly journals Flake (NH4)6Mo7O24/Polydopamine as a High Performance Anode for Lithium Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1115
Author(s):  
Ying Xie ◽  
Xiang Xiong ◽  
Kai Han
Keyword(s):  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Current Density ◽  
High Performance ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Ammonium Molybdate ◽  
Drying Methods ◽  
Lithium Storage ◽  
A Current

Ammonium molybdate tetrahydrate ((NH4)6Mo7O24) (AMT) is commonly used as the precursor to synthesize Mo-based oxides or sulfides for lithium ion batteries (LIBs). However, the electrochemical lithium storage ability of AMT itself is unclear so far. In the present work, AMT is directly examined as a promising anode material for Li-ion batteries with good capacity and cycling stability. To further improve the electrochemical performance of AMT, AMT/polydopamine (PDA) composite was simply synthesized via recrystallization and freeze drying methods. Unlike with block shape for AMT, the as-prepared AMT/PDA composite shows flake morphology. The initial discharge capacity of AMT/PDA is reached up to 1471 mAh g−1. It delivers a reversible discharge capacity of 702 mAh g−1 at a current density of 300 mA g−1, and a stable reversible capacity of 383.6 mA h g−1 is retained at a current density of 0.5 A g−1 after 400 cycles. Moreover, the lithium storage mechanism is fully investigated. The results of this work could potentially expand the application of AMT and Mo-based anode for LIBs.

ZnO@Ni–Co–S Core–Shell Nanorods-Decorated Carbon Fibers as Advanced Electrodes for High-Performance Supercapacitors

NANO ◽  
2018 ◽  
Vol 13 (12) ◽  
pp. 1850148 ◽  
Author(s):  
Yanwei Sui ◽  
Man Zhang ◽  
Haihua Hu ◽  
Yuanming Zhang ◽  
Jiqiu Qi ◽  
...  
Keyword(s):  
Current Density ◽  
High Performance ◽  
Zno Nanorods ◽  
Three Dimensional ◽  
Interfacial Area ◽  
Core Shell ◽  
Fast Diffusion ◽  
Potentiostatic Electrodeposition ◽  
One Step ◽  
A Current

The interconnected three-dimensional Ni–Co–S nanosheets were successfully deposited on ZnO nanorods by a one-step potentiostatic electrodeposition. The Ni–Co–S nanosheets provide a large electrode/electrolyte interfacial area which has adequate electroactive sites for redox reactions. Electrochemical characterization of the ZnO@Ni–Co–S core–shell nanorods presents high specifc capacitance (1302.5[Formula: see text]F/g and 1085[Formula: see text]F/g at a current density of 1 A/g and 20 A/g), excellent rate capabilities (83.3% retention at 20[Formula: see text]A/g) and great cycling stability (65% retention after 5000 cycles at a current density of 30[Formula: see text]A/g). The outstanding electrochemical performance of the as-prepared electrode material also can be ascribed to these reasons that the special structure improved electrical conductivity and allowed the fast diffusion of electrolyte ions.

Design and synthesis of hierarchical NiCo2S4@NiMoO4core/shell nanospheres for high-performance supercapacitors

2015 ◽  
Vol 39 (11) ◽  
pp. 8430-8438 ◽  
Author(s):  
Mingming Yao ◽  
Zhonghua Hu ◽  
Yafei Liu ◽  
Peipei Liu
Keyword(s):  
Specific Capacitance ◽  
Hydrothermal Method ◽  
Current Density ◽  
Electrode Material ◽  
High Performance ◽  
Three Dimensional ◽  
High Specific Capacitance ◽  
Core Shell ◽  
Design And Synthesis ◽  
A Current

A novel electrode material of three-dimensional hierarchical NiCo2S4@NiMoO4core/shell nanospheres was synthesized by a facile two-step hydrothermal method. These hierarchical NiCo2S4@NiMoO4core/shell nanospheres exhibit a high specific capacitance of 1714 F g−1at a current density of 1 A g−1, which indicated the excellent electrochemistry performance.

scholarly journals Synthesis of Si/Fe2O3-Anchored rGO Frameworks as High-Performance Anodes for Li-Ion Batteries

2021 ◽  
Vol 22 (20) ◽  
pp. 11041
Author(s):  
Yajing Yan ◽  
Yanxu Chen ◽  
Yongyan Li ◽  
Xiaoyu Wu ◽  
Chao Jin ◽  
...  
Keyword(s):  
High Performance ◽  
Melt Spinning ◽  
Three Dimensional ◽  
High Capacity ◽  
Reversible Capacity ◽  
High Energy ◽  
High Specific Surface Area ◽  
High Energy Density ◽  
Active Components ◽  
Li Ion

By virtue of the high theoretical capacity of Si, Si-related materials have been developed as promising anode candidates for high-energy-density batteries. During repeated charge/discharge cycling, however, severe volumetric variation induces the pulverization and peeling of active components, causing rapid capacity decay and even development stagnation in high-capacity batteries. In this study, the Si/Fe2O3-anchored rGO framework was prepared by introducing ball milling into a melt spinning and dealloying process. As the Li-ion battery (LIB) anode, it presents a high reversible capacity of 1744.5 mAh g−1 at 200 mA g−1 after 200 cycles and 889.4 mAh g−1 at 5 A g−1 after 500 cycles. The outstanding electrochemical performance is due to the three-dimensional cross-linked porous framework with a high specific surface area, which is helpful to the transmission of ions and electrons. Moreover, with the cooperation of rGO, the volume expansion of Si is effectively alleviated, thus improving cycling stability. The work provides insights for the design and preparation of Si-based materials for high-performance LIB applications.

Hydrogel-Derived Three-Dimensional Porous Si-CNT@G Nanocomposite with High-Performance Lithium Storage

2020 ◽  
Vol 36 (7) ◽  
pp. 1905034-0 ◽  
Author(s):  
Huifang An ◽  
Li Jiang ◽  
Feng Li ◽  
Ping Wu ◽  
Xiaoshu Zhu ◽  
...  
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Porous Si ◽  
Lithium Storage

scholarly journals A Ni(OH)2 nanopetals network for high-performance supercapacitors synthesized by immersing Ni nanofoam in water

2019 ◽  
Vol 10 ◽  
pp. 281-293 ◽  
Author(s):  
Donghui Zheng ◽  
Man Li ◽  
Yongyan Li ◽  
Chunling Qin ◽  
Yichao Wang ◽  
...  
Keyword(s):  
Power Density ◽  
Current Density ◽  
High Performance ◽  
Low Cost ◽  
Electrode Reaction ◽  
Commercial Application ◽  
Ion Diffusion ◽  
Symmetric Supercapacitor ◽  
Red Led ◽  
A Current

Developing a facile and environmentally friendly approach to the synthesis of nanostructured Ni(OH)2 electrodes for high-performance supercapacitor applications is a great challenge. In this work, we report an extremely simple route to prepare a Ni(OH)2 nanopetals network by immersing Ni nanofoam in water. A binder-free composite electrode, consisting of Ni(OH)2 nanopetals network, Ni nanofoam interlayer and Ni-based metallic glass matrix (Ni(OH)2/Ni-NF/MG) with sandwich structure and good flexibility, was designed and finally achieved. Microstructure and morphology of the Ni(OH)2 nanopetals were characterized. It is found that the Ni(OH)2 nanopetals interweave with each other and grow vertically on the surface of Ni nanofoam to form an “ion reservoir”, which facilitates the ion diffusion in the electrode reaction. Electrochemical measurements show that the Ni(OH)2/Ni-NF/MG electrode, after immersion in water for seven days, reveals a high volumetric capacitance of 966.4 F/cm3 at a current density of 0.5 A/cm3. The electrode immersed for five days exhibits an excellent cycling stability (83.7% of the initial capacity after 3000 cycles at a current density of 1 A/cm3). Furthermore, symmetric supercapacitor (SC) devices were assembled using ribbons immersed for seven days and showed a maximum volumetric energy density of ca. 32.7 mWh/cm3 at a power density of 0.8 W/cm3, and of 13.7 mWh/cm3 when the power density was increased to 2 W/cm3. The fully charged SC devices could light up a red LED. The work provides a new idea for the synthesis of nanostructured Ni(OH)2 by a simple approach and ultra-low cost, which largely extends the prospect of commercial application in flexible or wearable devices.

Integration of mesoporous nickel cobalt oxide nanosheets with ultrathin layer carbon wrapped TiO2 nanotube arrays for high-performance supercapacitors

2016 ◽  
Vol 40 (8) ◽  
pp. 6881-6889 ◽  
Author(s):  
Cuiping Yu ◽  
Yan Wang ◽  
Jianfang Zhang ◽  
Xia Shu ◽  
Jiewu Cui ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Cobalt Oxide ◽  
Current Density ◽  
High Performance ◽  
Tio2 Nanotube Arrays ◽  
Nanotube Arrays ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide ◽  
A Current ◽  
Ultrathin Layer

Novel nanocomposite NiCo2O4/C-TNAs were synthesized for high-performance supercapacitors with a specific capacitance of 934.9 F g−1 at a current density of 2 A g−1.

Encapsulating silicon nanoparticles into N-doped carbon film as a high-performance anode for lithium ion batteries

2018 ◽  
Vol 11 (04) ◽  
pp. 1850067 ◽  
Author(s):  
Zheng Xing ◽  
Chunlai Huang ◽  
Yichen Deng ◽  
Yulong Zhao ◽  
Zhicheng Ju
Keyword(s):  
Current Density ◽  
High Performance ◽  
Large Scale ◽  
Silicon Nanoparticles ◽  
Specific Capacity ◽  
Carbon Film ◽  
Lithium Ion ◽  
Fast Diffusion ◽  
Lithium Storage ◽  
Si Nanoparticles

A flexible strategy is to exploit encapsulating Si nanoparticles into N-doping carbon film (Si-NC) that can effectively localize the Si nanoparticles, thereby solving the problem of serious volume change during cycling as well as facilitating the fast diffusion of Li[Formula: see text], and thus achieving improved anode performance. A maximum capacity of 883.1[Formula: see text]mAh[Formula: see text]g[Formula: see text] at the current density of 100[Formula: see text]mA[Formula: see text]g[Formula: see text] after 50 charge and discharge processes is achieved for Si-NC. Even at a large current density of 2000[Formula: see text]mA[Formula: see text]g[Formula: see text], a specific capacity of 415[Formula: see text]mAh[Formula: see text]g[Formula: see text] is maintained. Moreover, the charge capacity can still almost recover the initial capacity as the current density is reverted to 100[Formula: see text]mA[Formula: see text]g[Formula: see text], indicating that Si-NC has a superior rate performance in lithium storage. This facile synthesis route provides a new perspective to produce Si/C composite at a low cost and large scale with good electrochemical performance.

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