Bimetallic phosphosulfide Zn–Ni–P–S nanosheets as binder-free electrodes for aqueous asymmetric supercapacitors with impressive performance

Although Ni–P based metal phosphides have high theoretical specific capacity, the poor rate capability and cycling stability hinder their practical application.

Download Full-text

One-Pot Synthesis of Glucose-Derived Carbon Coated Ni3S2 Nanowires as a Battery-Type Electrode for High Performance Supercapacitors

Nanomaterials ◽

10.3390/nano11030678 ◽

2021 ◽

Vol 11 (3) ◽

pp. 678

Author(s):

Zhongkai Wu ◽

Haifu Huang ◽

Wenhui Xiong ◽

Shiming Yang ◽

Huanhuan Huang ◽

...

Keyword(s):

Carbon Source ◽

High Performance ◽

Specific Capacity ◽

Rate Capability ◽

One Pot ◽

Great Performance ◽

Carbon Coated ◽

Binder Free ◽

Coated Carbon ◽

Supercapacitor Applications

We report a novel Ni3S2 carbon coated (denoted as NCC) rod-like structure prepared by a facile one-pot hydrothermal method and employ it as a binder free electrode in supercapacitor. We coated carbon with glucose as carbon source on the surface of samples and investigated the suitable glucose concentration. The as-obtained NCC rod-like structure demonstrated great performance with a huge specific capacity of 657 C g−1 at 1 A g−1, preeminent rate capability of 87.7% retention, the current density varying to 10 A g−1, and great cycling stability of 76.7% of its original value through 3500 cycles, which is superior to the properties of bare Ni3S2. The result presents a facile, general, viable strategy to constructing a high-performance material for the supercapacitor applications.

Download Full-text

Urchin-like NiCoP coated with a carbon layer as a high-performance electrode for all-solid-state asymmetric supercapacitors

Materials Advances ◽

10.1039/d0ma00058b ◽

2020 ◽

Vol 1 (3) ◽

pp. 481-494 ◽

Cited By ~ 1

Author(s):

Jingzhou Ling ◽

Hanbo Zou ◽

Wei Yang ◽

Shengzhou Chen

Keyword(s):

Solid State ◽

High Performance ◽

Specific Capacity ◽

Physical Structure ◽

Carbon Layer ◽

Cycling Stability ◽

High Conductivity ◽

Asymmetric Supercapacitors ◽

High Specific Capacity ◽

Excellent Cycling Stability

The NiCoP@C-ULAs composite with high conductivity, abundant pores and good physical structure shows high specific capacity and excellent cycling stability.

Download Full-text

Boosting the Rate and Cycling Performance of β-LixV2O5 Nanorods for Li Ion Battery by Electrode Surface Decoration

10.26434/chemrxiv.9791540.v1 ◽

2019 ◽

Author(s):

Panpan Wang ◽

Yue Du ◽

Baoyou Zhang ◽

Yanxin Yao ◽

Yuchen Xiao ◽

...

Keyword(s):

Electrochemical Performance ◽

Current Density ◽

Electrochemical Impedance ◽

Electronic Conductivity ◽

Specific Capacity ◽

Rate Capability ◽

Lithium Ion ◽

Ex Situ ◽

Practical Application ◽

Surface Decoration

The β-phase lithium vanadium oxide bronze (β-LixV2O5) with high theoretic specific capacity up to 440 mAh g-1 is considered as promising cathode materials, however, their practical application is hindered by its poor ionic and electronic conductivity, resulting in unsatisfied cyclic stability and rate capability. Herein, we report the surface decoration of β-LixV2O5 cathode using both reduced oxide graphene and ionic conductor LaPO4, which significantly promotes the electronic transfer and Li+ diffusion rate, respectively. As a result, the rGO/LaPO4/LixV2O5 composite exhibits excellent electrochemical performance in terms of high reversible specific capacity of 275.7 mAh g-1 with high capacity retention of 84.1% after 100 cycles at a current density of 60 mA g-1, and acceptable specific capacity of 170.3 mAh g-1 at high current density of 400 mA g-1. The cycled electrode is also analyzed by electrochemical impedance spectroscopy, ex-situ X-ray diffraction and scanning electron microscope, providing further insights into the improvement of electrochemical performance. Our results provide an effective approach to boost the electrochemical properties of lithium vanadates for practical application in lithium ion batteries.

Download Full-text

Electrochemical Performance of LiFePO4 Coated by Nano-Polyaniline Coater for Lithium-Ion Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.146-147.551 ◽

2010 ◽

Vol 146-147 ◽

pp. 551-555

Author(s):

Wen Qiang Gong ◽

Yi Feng Chen ◽

Bing Sun ◽

Han Chen

Keyword(s):

In Situ Polymerization ◽

Thermo Gravimetric Analysis ◽

Specific Capacity ◽

Rate Capability ◽

Lithium Ion ◽

Cycling Stability ◽

Gravimetric Analysis ◽

Capacity Loss ◽

Transmission Electron ◽

Polyaniline Composites

Aniline was polymerized on the surface of LiFePO4 particles by in-situ polymerization technique, forming LiFePO4/polyaniline composites. The composites were characterized by Thermo gravimetric analysis, specific surface area tests, high resolution transmission electron microscopy observation. The specific capacity, rate capability and cycling stability of composites were studied by charge-discharge tests. The experimental results show that the LiFePO4/polyaniline composite containing 6.75% polyaniline possesses the best electrochemical properties. Its initial capacity reaches 151.97 mAh.g-1 at C/10 rate, its cycling stability is excellent, its specific capacity is 124.89 mAh.g-1 at 1 C rate, its capacity loss is only 17.82% when rate increased from C/10 to 1 C.

Download Full-text

High-performance Bi2O3-NC anodes through constructing carbon shells and oxygen vacancies for flexible battery-supercapacitor hybrid devices

Nanoscale Advances ◽

10.1039/d0na00831a ◽

2021 ◽

Author(s):

Chao Yang ◽

Qi Jia ◽

Qianqian Pan ◽

Wentao Qi ◽

Rui Ling ◽

...

Keyword(s):

High Performance ◽

Oxygen Vacancies ◽

Specific Capacity ◽

Rate Capability ◽

Cycling Stability ◽

Hybrid Device ◽

Efficient Strategy ◽

Flexible Battery ◽

Hybrid Devices

A facile and efficient strategy of constructing carbon shells and oxygen vacancies is proposed, in order to improve specific capacity, rate capability and cycling stability of the Bi2O3 anode for the battery–supercapacitor hybrid device.

Download Full-text

MOF-derived Bi2O3@C microrods as negative electrodes for advanced asymmetric supercapacitors

RSC Advances ◽

10.1039/d0ra01470b ◽

2020 ◽

Vol 10 (24) ◽

pp. 14107-14112

Author(s):

Xianbo Yu ◽

Jie Sun ◽

Wenna Zhao ◽

Shihang Zhao ◽

Hongmei Chen ◽

...

Keyword(s):

Specific Capacity ◽

Cycling Stability ◽

Asymmetric Supercapacitors ◽

Negative Electrodes ◽

Excellent Cycling Stability ◽

Carbon Coat ◽

Electrodes For Supercapacitors

Bi2O3 microrods with a carbon coat (Bi2O3@C) exhibit ultrahigh specific capacity (1378 C g−1 at 0.5 A g−1) and excellent cycling stability (93% retention at 4000 cycles) as negative electrodes for supercapacitors.

Download Full-text

Cellulose-Derived Carbon Microfiber Mesh for Binder-Free Lithium—Sulfur Batteries

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2020.17687 ◽

2020 ◽

Vol 20 (9) ◽

pp. 5629-5635

Author(s):

Shiqi Li ◽

Zhiqun Cheng ◽

Tian Xie ◽

Zhihua Dong ◽

Guohua Liu

Keyword(s):

High Performance ◽

Carbon Materials ◽

Electronic Conductivity ◽

Specific Capacity ◽

Rate Capability ◽

Lithium Sulfide ◽

Lithium Sulfur Batteries ◽

Binder Free ◽

Carbon Microfiber ◽

Lithium Sulfur

The practical application of lithium–sulfur batteries (LSBs) has been impeded by several chronic problems related to the insulating nature of sulfur and lithium sulfide, in addition to the dissolution and diffusion of lithium polysulfides. In view of these problems, a large variety of carbonaceous materials have been employed to enhance the electronic conductivity of the cathode and/or sequester lithium polysulfides within conductive matrixes. Although they may exhibit impressive electrochemical performance, the fabrication of most carbon materials involves costly precursors and complicated procedures. Waste paper—the main constituent of municipal waste—is composed of carbohydrates, and can be an ideal precursor for carbon materials. Herein, carbon microfiber meshes (CMFMs) obtained by the pyrolysis of common filter paper in argon (A-CMFM) or ammonia (N-CMFM) were used to form sulfur cathodes. Compared with LSBs based on A-CMFM, those based on N-CMFM demonstrated higher specific capacity and better rate capability, with a capacity of 650 mA h g−1 at 0.2 C and 550 mA h g−1 at 0.5 C. This was owing to the strong immobilization of lithium polysulfides resulting from the heteroatom doping and hydrophilicity of N-CMFM. The results indicate that cellulose paper-derived carbon is a promising candidate for application in high-performance LSBs.

Download Full-text

Co2P nanoparticles encapsulated in 3D porous N-doped carbon nanosheet networks as an anode for high-performance sodium-ion batteries

Journal of Materials Chemistry A ◽

10.1039/c7ta09609g ◽

2018 ◽

Vol 6 (5) ◽

pp. 2139-2147 ◽

Cited By ~ 49

Author(s):

Dan Zhou ◽

Li-Zhen Fan

Keyword(s):

High Performance ◽

Specific Capacity ◽

Rate Capability ◽

Cobalt Nitrate ◽

Cycling Stability ◽

Sodium Ion ◽

Sodium Ion Batteries ◽

High Specific Capacity

A novel Co2P-3D PNC composite with Co2P NPs encapsulated in 3D porous N-doped carbon nanosheet networks was synthesized by a cobalt nitrate-induced PVP-blowing method combined with an in situ phosphidation process. The resultant Co2P-3D PNC anode delivers high specific capacity, enhanced rate capability, and improved cycling stability.

Download Full-text