Hierarchical electrodes of NiCo2S4 nanosheets-anchored sulfur-doped Co3O4 nanoneedles with advanced performance for battery-supercapacitor hybrid devices

2019 ◽  
Vol 7 (7) ◽  
pp. 3228-3237 ◽  
Author(s):  
Yu Ouyang ◽  
Haitao Ye ◽  
Xifeng Xia ◽  
Xinyan Jiao ◽  
Guangmin Li ◽  
...  
Keyword(s):  
Specific Capacity ◽  
Cycling Performance ◽  
Sulfur Doping ◽  
Hybrid Devices

The specific capacity and cycling performance of the hierarchical electrode were significantly enhanced due to the sulfur doping into Co3O4.

The synthesis of ZnS@MoS2 hollow polyhedrons for enhanced lithium storage performance

CrystEngComm ◽  
2018 ◽  
Vol 20 (45) ◽  
pp. 7266-7274 ◽  
Author(s):  
Yueying Zhao ◽  
Wanwan Wang ◽  
Mengna Chen ◽  
Ruojie Wang ◽  
Zhen Fang
Keyword(s):  
Specific Capacity ◽  
Cycling Performance ◽  
Lithium Storage ◽  
Storage Performance

ZnS@MoS2 hollow polyhedrons display outstanding cycling performance and high reversible specific capacity in LIB anodes.

Sulfur impregnation in polypyrrole-modified MnO2 nanotubes: efficient polysulfide adsorption for improved lithium–sulfur battery performance

Nanoscale ◽  
2019 ◽  
Vol 11 (20) ◽  
pp. 10097-10105 ◽  
Author(s):  
Pengcheng Du ◽  
Wenli Wei ◽  
Yuman Dong ◽  
Dong Liu ◽  
Qi Wang ◽  
...  
Keyword(s):  
Outer Layer ◽  
Specific Capacity ◽  
Cycling Performance ◽  
Lithium Sulfur Battery ◽  
Highly Efficient ◽  
Hollow Interior ◽  
Sulfur Host ◽  
Sulfur Battery ◽  
Lithium Sulfur

PPy-coated MnO2 nanotubes were fabricated as a highly efficient sulfur host. Hollow interior of the MnO2 nanotubes and the polypyrrole outer layer can effectively improve the specific capacity and maintain an extremely stable cycling performance.

Flower-like C@V2O5 microspheres as highly electrochemically active cathode in aqueous zinc-ion batteries

2020 ◽  
Vol 10 (10) ◽  
pp. 1697-1703
Author(s):  
Zebin Wu ◽  
Wei Zhou ◽  
Zhen Liu ◽  
Yijie Zhou ◽  
Guilin Zeng ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Retention Rate ◽  
Specific Capacity ◽  
Cycling Performance ◽  
Zinc Ion ◽  
Rate Performance ◽  
Capacity Retention ◽  
Facile Hydrothermal Method ◽  
High Specific Capacity ◽  
Electrochemically Active

Flower-like C@V2O5 microspheres with high specific capacity were synthesized by a facile hydrothermal method. The microstructure, specific capacity and electrochemical properties of C@V2O5 microspheres were studied. Results showed that the C@V2O5 microspheres with a diameter of ∼3 m are covered over by V2O5 nanosheets, and therefore have a large surface area which is almost 5 times higher than that of pure V2O5 powders. Moreover, the initial specific capacity of C@V2O5 microsphere is as high as 247.42 mAh · g–1, and after 100 cycles, the capacity retention rate is still 99.4%. Compared with pure V2O5, flower-like C@V2O5 microspheres show higher discharge specific capacity, better rate performance and more stable cycling performance.

Cation-exchange-assisted formation of NiS/SnS2 porous nanowalls with ultrahigh energy density for battery–supercapacitor hybrid devices

2020 ◽  
Vol 8 (6) ◽  
pp. 3300-3310 ◽  
Author(s):  
Shundong Guan ◽  
Xiuli Fu ◽  
Bo Zhang ◽  
Ming Lei ◽  
Zhijian Peng
Keyword(s):  
Energy Density ◽  
Cation Exchange ◽  
Specific Capacity ◽  
Ultrahigh Energy ◽  
Exchange Method ◽  
Aqueous Battery ◽  
Vertically Aligned ◽  
Hybrid Devices

Cation-exchange method is developed to synthesize vertically aligned NiS/SnS2 porous nanowalls for aqueous battery–supercapacitor hybrid devices with ultrahigh specific capacity.

Controlling the Voltage Window for Improved Cycling Performance of SnO2 as Anode Material for Lithium-Ion Batteries

2020 ◽  
Vol 20 (11) ◽  
pp. 7051-7056
Author(s):  
Jungwon Heo ◽  
Anupriya K. Haridas ◽  
Xueying Li ◽  
Rakesh Saroha ◽  
Younki Lee ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Oxide Materials ◽  
Capacity Fading ◽  
Lithium Ions ◽  
Volume Variation ◽  
Capacity Decay

Transition metal oxide materials with high theoretical capacities have been studied as substitutes for commercial graphite in lithiumion batteries. Among these, SnO2 is a promising alloying reaction-based anode material. However, the problem of rapid capacity fading in SnO2 due to volume variation during the alloying/dealloying processes must be solved. The lithiation of SnO2 results in the formation of a Li2O matrix. Herein, the volume variation of SnO2 was suppressed by controlling the voltage window to 1 V to prevent the delithiation reaction between Li2O and Sn. Using this strategy the unreacted Li2O matrix was enriched with metallic Sn particles, thereby providing a pathway for lithium ions. The specific capacity decay in the voltage window of 0.05–3 V was 1.8% per cycle. However, the specific capacity decay was improved to 0.04% per cycle after the voltage window was restricted (in the range of 0.05–1 V). This strategy resulted in a specific capacity of 374.7 mAh g−1 at 0.1 C after 40 cycles for the SnO2 anode.

scholarly journals Electrospun Fe3O4-Sn@Carbon Nanofibers Composite as Efficient Anode Material for Li-Ion Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2203
Author(s):  
Hong Wang ◽  
Yuejin Ma ◽  
Wenming Zhang
Keyword(s):  
Anode Materials ◽  
Electrochemical Reaction ◽  
Active Material ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Solvothermal Reaction ◽  
Li Ion Batteries ◽  
Li Ion ◽  
A Current

Nanoscale Fe3O4-Sn@CNFs was prepared by loading Fe3O4 and Sn nanoparticles onto CNFs synthesized via electrostatic spinning and subsequent thermal treatment by solvothermal reaction, and were used as anode materials for lithium-ion batteries. The prepared anode delivers an excellent reversible specific capacity of 1120 mAh·g−1 at a current density of 100 mA·g−1 at the 50th cycle. The recovery rate of the specific capacity (99%) proves the better cycle stability. Fe3O4 nanoparticles are uniformly dispersed on the surface of nanofibers with high density, effectively increasing the electrochemical reaction sites, and improving the electrochemical performance of the active material. The rate and cycling performance of the fabricated electrodes were significantly improved because of Sn and Fe3O4 loading on CNFs with high electrical conductivity and elasticity.

scholarly journals An Alternative Synthesis Route of LiFePO4-Carbon Composites for Li-Ion Cathodes

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Yongbing Lou ◽  
Jingjing Zhang ◽  
Lin Zhu ◽  
Lixu Lei
Keyword(s):  
Low Cost ◽  
Specific Capacity ◽  
Rate Capability ◽  
Cycling Performance ◽  
Environmentally Benign ◽  
Capping Agent ◽  
Discharge Performance ◽  
Peg 400 ◽  
Dispersive Effect ◽  
Good Crystallinity

LiFePO4-Carbon (LFP/C) composites with high purity and good crystallinity were prepared by an improved environmentally benign and low-cost solvothermal method. Capping agent polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG-400) showed no significant dispersive effect during the synthesis. These capping agents were converted into networking carbons after annealing, which consequently improved the charge and discharge performance. It was able to deliver a high initial discharge specific capacity of 154.1 mAh g−1for sample prepared with PVP and 145.6 mAh g−1for sample prepared with PEG-400 while having great capacity retention. The rate capability and cycling performance of LFP/C samples prepared with PVP or PEG-400 at high current rates were significantly improved compared to the LFP/C sample prepared without a capping agent.

C–S@PANI composite with a polymer spherical network structure for high performance lithium–sulfur batteries

2016 ◽  
Vol 18 (1) ◽  
pp. 261-266 ◽  
Author(s):  
Junkai Wang ◽  
Kaiqiang Yue ◽  
Xiaodan Zhu ◽  
Kang L. Wang ◽  
Lianfeng Duan
Keyword(s):  
High Performance ◽  
Specific Capacity ◽  
3D Structure ◽  
Conductive Polymer ◽  
Cycling Performance ◽  
High Specific Capacity ◽  
Pani Composite ◽  
Lithium Sulfur Batteries ◽  
And Migration ◽  
Lithium Sulfur

C–S@PANI composite with conductive polymer spherical network was synthesized. Its 3D structure inhibits the dissolution and migration of polysulfides into electrolyte, delivering high specific capacity and a stable cycling performance.

scholarly journals Metal–Oleate Complex-Derived Bimetallic Oxides Nanoparticles Encapsulated in 3D Graphene Networks as Anodes for Efficient Lithium Storage with Pseudocapacitance

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Yingying Cao ◽  
Kaiming Geng ◽  
Hongbo Geng ◽  
Huixiang Ang ◽  
Jie Pei ◽  
...  
Keyword(s):  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Diffusion Path ◽  
Cycling Performance ◽  
Lithium Storage ◽  
Graphene Oxides ◽  
3D Graphene ◽  
Metal Oleate ◽  
Bimetallic Oxides

Abstract In this manuscript, we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate complex embedded in 3D graphene networks (MnO/CoMn2O4 ⊂ GN), as an anode material for lithium ion batteries. The novel synthesis of the MnO/CoMn2O4 ⊂ GN consists of thermal decomposition of metal–oleate complex containing cobalt and manganese metals and oleate ligand, forming bimetallic oxides nanoparticles, followed by a self-assembly route with reduced graphene oxides. The MnO/CoMn2O4 ⊂ GN composite, with a unique architecture of bimetallic oxides nanoparticles encapsulated in 3D graphene networks, rationally integrates several benefits including shortening the diffusion path of Li+ ions, improving electrical conductivity and mitigating volume variation during cycling. Studies show that the electrochemical reaction processes of MnO/CoMn2O4 ⊂ GN electrodes are dominated by the pseudocapacitive behavior, leading to fast Li+ charge/discharge reactions. As a result, the MnO/CoMn2O4 ⊂ GN manifests high initial specific capacity, stable cycling performance, and excellent rate capability.

A sandwich nanocomposite composed of commercially available SnO and reduced graphene oxide as advanced anode materials for sodium-ion full batteries

2021 ◽  
Author(s):  
Xu Yang ◽  
Hao-Jie Liang ◽  
Xin-Xin Zhao ◽  
Hai-Yue Yu ◽  
Mei-Yi Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Anode Materials ◽  
Sandwich Structure ◽  
Freeze Drying ◽  
Specific Capacity ◽  
Cycling Performance ◽  
Sodium Ion ◽  
Reduced Graphene

A sandwich structure with SnO and reduced graphene oxide (SnO/rGO) is designed via freeze drying. It delivers a specific capacity of 109.5 mA h g−1 with a retention of 70.62% after 1200 cycles at 4 A g−1, revealing its stable cycling performance.

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