KMn7.6Co0.4O16 nano-rod clusters with a high discharge specific capacity as cathode materials for potassium-ion batteries

2019 ◽  
Vol 3 (3) ◽  
pp. 736-743 ◽  
Author(s):  
Zige Tai ◽  
Ming Shi ◽  
Shaokun Chong ◽  
Yuanzhen Chen ◽  
Qiang Tan ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Specific Capacity ◽  
Potassium Ion ◽  
High Discharge ◽  
Discharge Specific Capacity ◽  
First Time ◽  
Initial Capacity

We prepared KMn7.6Co0.4O16 as a cathode with high initial capacity for potassium-ion batteries for the first time.

Al/Ga co-doped V6O13 nanorods with high discharge specific capacity as cathode materials for lithium-ion batteries

2021 ◽  
pp. 115220
Author(s):  
Shuchao Zhang ◽  
Zhengguang Zou ◽  
Huanhuan Zhang ◽  
Jie Liu ◽  
Shenglin Zhong
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Discharge ◽  
Discharge Specific Capacity ◽  
Co Doped

Influence of the Preparation Process on the Electrochemical Properties of xLiFePO4·yLi3V2(PO4)3/C Nano-Sized Composite Cathode Materials

2016 ◽  
Vol 680 ◽  
pp. 238-243 ◽  
Author(s):  
Bing Yan ◽  
Peng Zhao Gao ◽  
Dong Yun Li ◽  
Guang Lei Tian
Keyword(s):  
Citric Acid ◽  
Electrochemical Properties ◽  
Cathode Materials ◽  
Retention Rate ◽  
Specific Capacity ◽  
Composite Cathode ◽  
Discharge Process ◽  
Discharge Specific Capacity ◽  
Calcination Temperatures ◽  
Charge Discharge

In this paper, a series of xLiFePO4·yLi3V2(PO4)3/C (x/y = 1:0, 7:1, 5:1, 3:1, 1:1, 1:3 and 0:1, ratio in mol) nano-sized composite cathode materials were successfully prepared via the solid reaction method. Influence of x/y ratio, calcination temperatures and the content of citric acid on the composition, microstructure and electrochemical properties of the materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical measurements, et al. results showed that the xLFP·yLVP/C (x and y ≠ 0) composites were composed of olivine LiFePO4 and monoclinic Li3V2(PO4)3, both of which featured slight structural distortions as the formation of V-doped LFP/C and Fe-doped LVP/C, respectively; With the increase of calcination temperatures, the crystallinity and particles size of the 7LFP·LVP/C composites increased, when calcined at 700°C, the initial charge/discharge specific capacity of the composites reached a maximum value of 145.6 mAh/g, and the voltage drop values between charge/discharge platform possessed the minimum value(0.04 V), suggesting the minimum polarization of the composites in charge/discharge process. Content of citric acid did not affect the compositions of the composites, with the increase of the molar ratio of citric acid to V3+, the discharge specific capacities of 7LFP·LVP/C increased first and then decreased, when it equaled to 1.0:1.0, the discharge specific capacity of the relative composites was 119.18 mAh/g, with a capacity retention rate of 93.9 % after 50 cycles, owning the excellent electrochemical stability.

Poly(tetrahydrobenzodithiophene): High discharge specific capacity as cathode material for lithium batteries

2009 ◽  
Vol 193 (2) ◽  
pp. 859-863 ◽  
Author(s):  
Lizhi Zhan ◽  
Zhiping Song ◽  
Ning Shan ◽  
Jingyu Zhang ◽  
Jing Tang ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Batteries ◽  
Specific Capacity ◽  
High Discharge ◽  
Discharge Specific Capacity

Investigation of K3V2(PO4)3/C nanocomposites as high-potential cathode materials for potassium-ion batteries

2017 ◽  
Vol 53 (11) ◽  
pp. 1805-1808 ◽  
Author(s):  
Jin Han ◽  
Guan-Nan Li ◽  
Feng Liu ◽  
Minqiang Wang ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Three Dimensional ◽  
Potassium Ion ◽  
High Potential ◽  
Conductive Network ◽  
First Time

Novel K3V2(PO4)3 and three-dimensional conductive network K3V2(PO4)3/C nanocomposites are successfully fabricated and further evaluated as cathode materials for potassium-ion batteries for the first time.

scholarly journals PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1732
Author(s):  
Dan Zhao ◽  
Qian Zhao ◽  
Zhenyu Wang ◽  
Lan Feng ◽  
Jinying Zhang ◽  
...  
Keyword(s):  
Surface Engineering ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Average Diameter ◽  
Potassium Ion ◽  
Red Phosphorus ◽  
Fast Charging ◽  
Potential Alternative ◽  
High Theoretical Capacity

Potassium-ion batteries (KIBs) have come up as a potential alternative to lithium-ion batteries due to abundant potassium storage in the crust. Red phosphorus is a promising anode material for KIBs with abundant resources and high theoretical capacity. Nevertheless, large volume expansion, low electronic conductivity, and limited K+ charging speed in red phosphorus upon cycling have severely hindered the development of red phosphorus-based anodes. To obtain improved conductivity and structural stability, surface engineering of red phosphorus is required. Poly(3,4-ethylenedioxythiophene) (PEDOT)-coated red phosphorus nanospheres (RPNP@PEDOT) with an average diameter of 60 nm were synthesized via a facile solution-phase approach. PEDOT can relieve the volume change of red phosphorus and promote electron/ion transportation during charge−discharge cycles, which is partially corroborated by our DFT calculations. A specific capacity of 402 mAh g−1 at 0.1 A g−1 after 40 cycles, and a specific capacity of 302 mAh g−1 at 0.5 A g−1 after 275 cycles, were achieved by RPNP@PEDOT anode with a high pseudocapacitive contribution of 62%. The surface–interface engineering for the organic–inorganic composite of RPNP@PEDOT provides a novel perspective for broad applications of red phosphorus-based KIBs in fast charging occasions.

Challenges and Strategies toward Cathode Materials for Rechargeable Potassium‐Ion Batteries

2021 ◽  
pp. 2004689
Author(s):  
Shude Liu ◽  
Ling Kang ◽  
Seong Chan Jun
Keyword(s):  
Cathode Materials ◽  
Potassium Ion ◽  
Challenges And Strategies

On the Electrochemical Insertion of Mg2+in Na7V4(P2O7)4(PO4) and Na3V2(PO4)3 Host Materials

2021 ◽  
Author(s):  
Saustin Dongmo ◽  
Fabio Maroni ◽  
Cornelius Gauckler ◽  
Mario Marinaro ◽  
Margret Wohlfahrt-Mehrens
Keyword(s):  
Energy Storage ◽  
Research And Development ◽  
Cathode Materials ◽  
Fast Kinetics ◽  
The Earth ◽  
Host Materials ◽  
High Potentials ◽  
Phosphate Phase ◽  
Storage Technologies ◽  
First Time

Abstract Next generation energy storage technologies need to be more sustainable and cheaper. Among Post-Li chemistries, Mg batteries are emerging as a possible alternative with desirable features like abundance of Mg on the Earth`s crust and a doubled volumetric capacity with respect to the current Li metal. However, research and development of Mg-batteries is still in its infancy stage and still many hurdles are to be understood and solved. For instance, cathode materials showing high capacities, operating at high potentials and with sufficient fast kinetics need to be designed and developed. Polyanionic materials are a class of sustainable and environmentally friendly materials that emerged as possible Mg2+ hosts. In this work the insertion of Mg cations inside the NASICON Na3V2(PO4)3 and, for the first time, in the mixed phosphate phase Na7V4(P2O7)4(PO4), is reported, structurally and electrochemically characterized.

Potato Peel Based Carbon–Sulfur Composite as Cathode Materials for Lithium Sulfur Battery

2021 ◽  
Vol 21 (12) ◽  
pp. 6243-6247
Author(s):  
Arenst Andreas Arie ◽  
Shealyn Lenora ◽  
Hans Kristianto ◽  
Ratna Frida Susanti ◽  
Joong Kee Lee
Keyword(s):  
Cathode Materials ◽  
Porous Carbon ◽  
Chemical Activation ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Electrochemical Characteristics ◽  
Potato Peel ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur

Lithium sulfur battery has become one of the promising rechargeable battery systems to replace the conventional lithium ion battery. Commonly, it uses carbon–sulfur composites as cathode materials. Biomass based carbons has an important role in enhancing its electrochemical characteristics due to the high conductivity and porous structures. Here, potato peel wastes have been utilized to prepare porous carbon lithium sulfur battery through hydrothermal carbonization followed by the chemical activation method using KOH. After sulfur loading, as prepared carbon–sulfur composite shows stable coulombic efficiencies of above 98% and a reversible specific capacity of 804 mAh g−1 after 100 cycles at current density of 100 mA g−1. These excellent electrochemical properties can be attributed to the unique structure of PPWC showing mesoporous structure with large specific surface areas. These results show the potential application of potato peel waste based porous carbon as electrode’s materials for lithium sulfur battery.

Exploration of K2Ti8O17 as an anode material for potassium-ion batteries

2016 ◽  
Vol 52 (75) ◽  
pp. 11274-11276 ◽  
Author(s):  
Jin Han ◽  
Maowen Xu ◽  
Yubin Niu ◽  
Guan-Nan Li ◽  
Minqiang Wang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Anode Material ◽  
Annealing Treatment ◽  
Potassium Ion ◽  
Subsequent Annealing ◽  
Facile Hydrothermal Method ◽  
First Time

Novel K2Ti8O17 is successfully fabricated via a facile hydrothermal method combined with a subsequent annealing treatment and further evaluated as an anode material for potassium-ion batteries for the first time.

scholarly journals MnO2/rGO/CNTs Framework as a Sulfur Host for High-Performance Li-S Batteries

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1989 ◽  
Author(s):  
Wei Dong ◽  
Lingqiang Meng ◽  
Xiaodong Hong ◽  
Sizhe Liu ◽  
Ding Shen ◽  
...  
Keyword(s):  
High Performance ◽  
Physical Adsorption ◽  
Rapid Development ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Framework Structure ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
Initial Capacity

Lithium-sulfur batteries are very promising next-generation energy storage batteries due to their high theoretical specific capacity. However, the shuttle effect of lithium-sulfur batteries is one of the important bottlenecks that limits its rapid development. Herein, physical and chemical dual adsorption of lithium polysulfides are achieved by designing a novel framework structure consisting of MnO2, reduced graphene oxide (rGO), and carbon nanotubes (CNTs). The framework-structure composite of MnO2/rGO/CNTs is prepared by a simple hydrothermal method. The framework exhibits a uniform and abundant mesoporous structure (concentrating in ~12 nm). MnO2 is an α phase structure and the α-MnO2 also has a significant effect on the adsorption of lithium polysulfides. The rGO and CNTs provide a good physical adsorption interaction and good electronic conductivity for the dissolved polysulfides. As a result, the MnO2/rGO/CNTs/S cathode delivered a high initial capacity of 1201 mAh g−1 at 0.2 C. The average capacities were 916 mAh g−1, 736 mAh g−1, and 547 mAh g−1 at the current densities of 0.5 C, 1 C, and 2 C, respectively. In addition, when tested at 0.5 C, the MnO2/rGO/CNTs/S exhibited a high initial capacity of 1010 mAh g−1 and achieved 780 mAh g−1 after 200 cycles, with a low capacity decay rate of 0.11% per cycle. This framework-structure composite provides a simple way to improve the electrochemical performance of Li-S batteries.

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