scholarly journals Effect of 3D Metal on Electrochemical Properties of Sodium Intercalation Cathode P2-NaxMe1/3Mn2/3O2 (M = Co, Ni, or Fe)

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Nam Pham Phuong Le ◽  
Nguyen Le Thanh Huynh ◽  
An Le Bao Phan ◽  
Dieu Thi Ngoc Nguyen ◽  
Trang Thi Thu Nguyen ◽  
...  
Keyword(s):  
Specific Capacity ◽  
Rate Capability ◽  
Cycling Performance ◽  
High Rate ◽  
Cyclic Voltammogram ◽  
Depth Of Discharge ◽  
Solid Solution Region ◽  
Reversible Redox ◽  
Coprecipitation Process ◽  
Solution Region

This research aims to evaluate the influence of different 3D metals (Fe, Co, and Ni) substituted to Mn on the electrochemical performance of P2-NaxMe1/3Mn2/3O2 material, which was synthesized by the coprecipitation process followed by calcination at high temperature. X-ray diffraction (XRD) results revealed that the synthesized Mn-rich materials possessed a P2-type structure with a negligible amount of oxide impurities. The materials possessed their typical cyclic voltammogram and charge-discharge profiles; indeed, a high reversible redox reaction was obtained by NaxCo1/3Mn2/3O2 sample. Both NaxCo1/3Mn2/3O2 and NaxFe1/3Mn2/3O2 provided a high specific capacity of above 140 mAh·g−1; however, the former showed better cycling performance with 83% capacity retention after 50 cycles at C/10 and high rate capability. Meanwhile, the Ni-sub NaxNi1/3Mn2/3O2 exhibited excellent cycling stability but a low specific capacity of 110 mAh·g−1 and inferior rate capability. The diffusion coefficient of Na+ ions into the structure tended to decrease with a depth of discharge; those values were in the range of 10−10–10−9 cm2·s−1 and 10−11–10−10 cm2·s−1 in the solid solution region and biphasic region, respectively.

In situ hydrothermal synthesis of double-carbon enhanced novel cobalt germanium hydroxide composites as promising anode material for sodium ion batteries

2021 ◽  
Author(s):  
Ni Wen ◽  
Siyuan Chen ◽  
Jingjie Feng ◽  
Ke Zhang ◽  
Zhiyong Zhou ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Anode Material ◽  
Rate Capability ◽  
Cycling Performance ◽  
Sodium Ion ◽  
High Rate ◽  
Sodium Ion Batteries ◽  
High Rate Capability

The double-carbon confined CGH@C/rGO composite is designed via a facile in situ hydrothermal strategy. When used as an anode for sodium-ion batteries, it exhibits superior reversible capacities, high rate capability, and stable cycling performance.

Guar gum as a novel binder for sulfur composite cathodes in rechargeable lithium batteries

2016 ◽  
Vol 52 (92) ◽  
pp. 13479-13482 ◽  
Author(s):  
Qinyu Li ◽  
Huijun Yang ◽  
Lisheng Xie ◽  
Jun Yang ◽  
Yanna Nuli ◽  
...  
Keyword(s):  
Lithium Batteries ◽  
Guar Gum ◽  
Rate Capability ◽  
Composite Cathode ◽  
Cycling Performance ◽  
High Rate ◽  
Rechargeable Lithium Batteries ◽  
High Rate Capability ◽  
Composite Cathodes ◽  
Aqueous Binder

In this work, we investigate a novel aqueous binder which promotes S@pPAN composite cathode materials exhibiting excellent cycling performance and favorable high rate capability.

Block copolymer-guided fabrication of shuttle-like polyaniline nanoflowers with radiating whiskers for application in supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1016-1023 ◽  
Author(s):  
Hongyu Mi ◽  
Jiapan Zhou ◽  
Zongbin Zhao ◽  
Chang Yu ◽  
Xuzhen Wang ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Rate Capability ◽  
Cycling Performance ◽  
High Rate ◽  
High Rate Capability ◽  
Microemulsion Method

Superfine shuttle-shaped polyaniline (PANI) nanoflowers with radiating whiskers have been prepared by block copolymer-assisted microemulsion method, and exhibited high rate capability and good cycling performance.

An artificial sea urchin with hollow spines: improved mechanical and electrochemical stability in high-capacity Li–Ge batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 5812-5816 ◽  
Author(s):  
Jinyun Liu ◽  
Xirong Lin ◽  
Tianli Han ◽  
Qianqian Lu ◽  
Jiawei Long ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Sea Urchin ◽  
Specific Capacity ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Electrochemical Stability ◽  
High Rate ◽  
High Rate Capability ◽  
High Specific Capacity

Metallic germanium (Ge) as the anode can deliver a high specific capacity and high rate capability in lithium ion batteries.

scholarly journals Synthesis of Hierarchical Graphene-MnO2 Nanowire Composites with Enhanced Specific Capacitance

2019 ◽  
Vol 31 (8) ◽  
pp. 1709-1718
Author(s):  
T. Veldevi ◽  
K. Thileep Kumar ◽  
R.A. Kalaivani ◽  
S. Raghu ◽  
A.M. Shanmugharaj
Keyword(s):  
Surface Area ◽  
Electrode Materials ◽  
High Surface ◽  
Specific Capacity ◽  
High Surface Area ◽  
Rate Capability ◽  
Sulfate Solution ◽  
High Rate ◽  
Chemical Compositions ◽  
Structure Morphology

Hierarchical nanostructured graphene–manganese dioxide nanowire (G-MnO2-NW) composites have been prepared by hydrothermal synthesis route using water/1-decanol as the medium. Synthesized materials were analyzed using various characterization tools to corroborate their chemical compositions, structure/morphology and surface area. Electrochemical measurements of the synthesized G-MnO2-NW electrode materials delivered the highest specific capacity (255 Fg-1), high rate capability and improved cycling stability at 0.5 Ag–1 in 1M sodium sulfate solution and this fact may be attributed to its high surface area and porosity. Moreover, synthesized G-MnO2-NW electrodes displayed better energy and power density, when compared to the MnO2-NW based electrodes.

Advanced amorphous nanoporous stannous oxide composite with carbon nanotubes as anode materials for lithium-ion batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (78) ◽  
pp. 41281-41286 ◽  
Author(s):  
Wenjuan Jiang ◽  
Weiyao Zeng ◽  
Zengsheng Ma ◽  
Yong Pan ◽  
Jianguo Lin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Anode Materials ◽  
Electronic Conductivity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Liquid Electrolyte ◽  
High Rate ◽  
High Rate Capability ◽  
Active Materials

Good electronic conductivity and mechanical properties are obtained by introducing CNTs into an ANSO@CNTs anode material. The anode possesses a super cycling performance and a high rate capability because the porous structure facilitates liquid electrolyte diffusion into active materials.

scholarly journals Boosting High-Rate Zinc-Storage Performance by the Rational Design of Mn2O3 Nanoporous Architecture Cathode

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Danyang Feng ◽  
Tu-Nan Gao ◽  
Ling Zhang ◽  
Bingkun Guo ◽  
Shuyan Song ◽  
...  
Keyword(s):  
High Performance ◽  
Manganese Oxides ◽  
Rational Design ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Rate Capability ◽  
High Rate ◽  
Pore Sizes ◽  
Storage Performance ◽  
Zinc Storage

AbstractManganese oxides are regarded as one of the most promising cathode materials in rechargeable aqueous Zn-ion batteries (ZIBs) because of the low price and high security. However, the practical application of Mn2O3 in ZIBs is still plagued by the low specific capacity and poor rate capability. Herein, highly crystalline Mn2O3 materials with interconnected mesostructures and controllable pore sizes are obtained via a ligand-assisted self-assembly process and used as high-performance electrode materials for reversible aqueous ZIBs. The coordination degree between Mn2+ and citric acid ligand plays a crucial role in the formation of the mesostructure, and the pore sizes can be easily tuned from 3.2 to 7.3 nm. Ascribed to the unique feature of nanoporous architectures, excellent zinc-storage performance can be achieved in ZIBs during charge/discharge processes. The Mn2O3 electrode exhibits high reversible capacity (233 mAh g−1 at 0.3 A g−1), superior rate capability (162 mAh g−1 retains at 3.08 A g−1) and remarkable cycling durability over 3000 cycles at a high current rate of 3.08 A g−1. Moreover, the corresponding electrode reaction mechanism is studied in depth according to a series of analytical methods. These results suggest that rational design of the nanoporous architecture for electrode materials can effectively improve the battery performance. "Image missing"

scholarly journals Effect of Mixed Li+/Na+-ion Electrolyte on Electrochemical Performance of Na4Fe3(PO4)2P2O7 in Hybrid Batteries

Batteries ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 39 ◽  
Author(s):  
Kosova ◽  
Shindrov
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacity ◽  
Rate Capability ◽  
High Rate ◽  
Cathode Side ◽  
Electrochemical Cells ◽  
Operating Voltage ◽  
High Rate Capability ◽  
Structured Materials ◽  
Na Ions

The mixed sodium-iron ortho-pyrophosphate Na4Fe3(PO4)2P2O7 (NFPP) is a promising Na-containing cathode material with the highest operating voltage among sodium framework structured materials. It operates both in Na and Li electrochemical cells. When cycled in a hybrid Li/Na cell, a competitive co-intercalation of the Li+ and Na+ ions occurs at the cathode side. The present study shows that this process can be tuned by changing the concentration of the Na+ ions in the mixed Li+/Na+-ion electrolyte and current density. It is shown that if the Na concentration in the electrolyte increases, the specific capacity of NFPP also increases and its high-rate capability is significantly improved.

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.

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