Rocking-Chair Proton battery Based on a low-cost “Water in Salt” Electrolyte

2022 ◽  
Author(s):  
Beibei Yang ◽  
Tian Qin ◽  
Yanyan Du ◽  
Yulin Zhang ◽  
Jin Wang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Low Cost ◽  
Proton Battery

A novel “water in salt” electrolyte is reported to design the rocking-chair proton battery. In 20 M ZnCl2+1 M HCl electrolyte, the electrochemical performance of proton storage using MoO3 is...

scholarly journals Improvement of long-term cycling performance of high-nickel cathode materials by ZnO coating

2021 ◽  
Vol 10 (1) ◽  
pp. 210-220
Author(s):  
Fangfang Wang ◽  
Ruoyu Hong ◽  
Xuesong Lu ◽  
Huiyong Liu ◽  
Yuan Zhu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Low Cost ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Side Reaction ◽  
Chemical Route ◽  
High Nickel

Abstract The high-nickel cathode material of LiNi0.8Co0.15Al0.05O2 (LNCA) has a prospective application for lithium-ion batteries due to the high capacity and low cost. However, the side reaction between the electrolyte and the electrode seriously affects the cycling stability of lithium-ion batteries. In this work, Ni2+ preoxidation and the optimization of calcination temperature were carried out to reduce the cation mixing of LNCA, and solid-phase Al-doping improved the uniformity of element distribution and the orderliness of the layered structure. In addition, the surface of LNCA was homogeneously modified with ZnO coating by a facile wet-chemical route. Compared to the pristine LNCA, the optimized ZnO-coated LNCA showed excellent electrochemical performance with the first discharge-specific capacity of 187.5 mA h g−1, and the capacity retention of 91.3% at 0.2C after 100 cycles. The experiment demonstrated that the improved electrochemical performance of ZnO-coated LNCA is assigned to the surface coating of ZnO which protects LNCA from being corroded by the electrolyte during cycling.

Fine-tuning of the water oxidation performance of hierarchical Co3O4 nanostructures prepared from different cobalt precursors

2021 ◽  
Author(s):  
Pradnya Bodhankar ◽  
Avani Chunduri ◽  
Nainesh Patel ◽  
Dattatray Sadashiv Dhawale ◽  
Ajayan Vinu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Water Oxidation ◽  
Low Cost ◽  
Fine Tuning ◽  
Oxidation Performance ◽  
Co3o4 Nanostructures

Design of efficient and low-cost catalyst for water oxidation, which can outperform the electrochemical performance is of great importance. Herein, we report on fine-tuning of water oxidation performance using solvothermal...

ZnCl2 regulate flax-based porous carbon fiber for long cycle stability supercapacitors

2021 ◽  
Author(s):  
Gaigai Duan ◽  
Luying Zhao ◽  
Lian Chen ◽  
Feng Wang ◽  
Shuijian He ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Electrochemical Performance ◽  
Porous Carbon ◽  
Low Cost ◽  
Flax Fiber ◽  
Cycle Stability ◽  
Long Cycle

The flax fiber with abundant sources and low cost is an excellent precursor of carbon fiber for supercapacitor. At present, it is very attractive designing high electrochemical performance electrode via...

scholarly journals LiFePO4-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 842 ◽  
Author(s):  
Yanqing Fu ◽  
Qiliang Wei ◽  
Gaixia Zhang ◽  
Yu Zhong ◽  
Nima Moghimian ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Lithium Iron Phosphate ◽  
Low Cost ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Full Potential ◽  
Active Materials ◽  
Size And Morphology ◽  
The Impact

In this work, we investigated three types of graphene (i.e., home-made G, G V4, and G V20) with different size and morphology, as additives to a lithium iron phosphate (LFP) cathode for the lithium-ion battery. Both the LFP and the two types of graphene (G V4 and G V20) were sourced from industrial, large-volume manufacturers, enabling cathode production at low cost. The use of wrinkled and/or large pieces of a graphene matrix shows promising electrochemical performance when used as an additive to the LFP, which indicates that the features of large and curved graphene pieces enable construction of a more effective conducting network to realize the full potential of the active materials. Specifically, compared to pristine LFP, the LFP/G, LFP/G V20, and LFP/G V4 show up to a 9.2%, 6.9%, and 4.6% increase, respectively, in a capacity at 1 C. Furthermore, the LFP combined with graphene exhibits a better rate performance than tested with two different charge/discharge modes. Moreover, from the economic and electrochemical performance view point, we also demonstrated that 1% of graphene content is optimized no matter the capacity calculated, based on the LFP/graphene composite or pure LFP.

Cellulose Nanocrystals Assisted Preparation of Electrochemical Energy Storage Electrodes

2017 ◽  
Author(s):  
Danny Illera ◽  
Victor Fontalvo ◽  
Humberto Gomez
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Surface Area ◽  
Cellulose Nanocrystals ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Film Deposition ◽  
One Step ◽  
Film Synthesis ◽  
Storage Technologies

Renewable energy sources demands sustainable energy storage technologies through the incorporation of low-cost and environment-friendly materials. In this regard, cellulose nanocrystals (CN), which are needle-shaped nanostructure derived from cellulose-rich resources, are extracted by sulfuric acid hydrolysis of biomass and used as both template and binder for the construction of electrochemical capacitors electrodes. A composite material is synthetized comprising CN and a conjugated electroactive polymer (CEP) to overcome the electrical insulating properties of cellulose as well as to exploit enhanced electrochemical activity by increased electrode surface-area. A one-step in-situ film synthesis protocol is evaluated by performing simultaneous polymerization and film deposition. The effect of proportion of starting components are evaluated through statistical Response Surface Methodology towards optimizing the electrochemical performance. Depending on the mass proportion of the starting components, a conducting network could be created by surface coating of the CEP on the whiskers during polymerization. Electrochemical measurements suggest an increase in specific surface area by at least a factor of two relative to bare CEP as a consequence of the template role of cellulose. Therefore, adjustment of the proposed one-step synthesis parameters allows tuning the material properties to meet specific application requirements regarding electrochemical performance.

Research on phosphorus-doped nano-carbon as ORR catalysts in alkaline electrolyte

2019 ◽  
Vol 33 (05) ◽  
pp. 1950046
Author(s):  
Yuanyuan Zhang ◽  
Naibao Huang ◽  
Shaoming Qiao ◽  
Junjie Zhang ◽  
Zhengyuan Gao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Active Sites ◽  
Low Cost ◽  
Mesoporous Structure ◽  
Alkaline Electrolyte ◽  
Carbon Catalyst ◽  
Onset Potential ◽  
The Cost ◽  
Exchange Membrane ◽  
Phosphorus Doped

In order to reduce the cost of the catalysts for the anion exchange membrane fuel cell (AEMFC), phosphorus-doped XC-72 carbon catalyst was prepared by one-step carbonization using XC-72 carbon and triphenyl phosphorus (TPP) as carbon source and phosphorus source. The structure, morphology and electrochemical performance of the phosphorus-doped carbon catalyst were evaluated by physical characterization and electrochemical methods. When the proportion of triphenyl phosphorus and XC-72 is 1:5, and carbonization temperature is [Formula: see text], the obtained catalyst shows mesoporous structure formed by the accumulation of nanospheres and exhibits better electrochemical performance, including more positive onset potential (−0.12 V), the largest current density [Formula: see text], which is slightly equal to commercial 20%Pt/C [Formula: see text]. Moreover, P is doped in carbon with C–P and O–P bond, which provide active sites to improve electrochemical performance. Low cost precursor and facile preparation of P-doped C is a candidate for full cell catalyst.

N-doped porous carbon derived from walnut shells with enhanced electrochemical performance for supercapacitor

2019 ◽  
Vol 12 (03) ◽  
pp. 1950042 ◽  
Author(s):  
Yunfeng Wang ◽  
Honghui Jiang ◽  
Shewen Ye ◽  
Jiaming Zhou ◽  
Jiahao Chen ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Porous Carbon ◽  
Low Cost ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Electrochemical Performances ◽  
Walnut Shells ◽  
Electrochemical Cycling ◽  
Elemental Doping

As the low-cost, natural multi-component for elemental doping and environment-friendly characteristics, biomass-derived porous carbon for energy storage attracts intense attention. Herein, walnut shells-based porous carbon has been obtained through carbonization, hydrothermal and activation treatment. The corresponding porous carbon owns superior electrochemical performances with specific capacitance reaching up to 462[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], and shows excellent cycling stability (5000 cycles, [Formula: see text]94.2% of capacitance retention at 10[Formula: see text]A[Formula: see text]g[Formula: see text]). Moreover, the symmetry supercapacitor achieves high specific capacitance (197[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text]), relevant electrochemical cycling stability (5000 cycles, 89.2% of capacitance retention at 5[Formula: see text]A[Formula: see text]g[Formula: see text]) and high power/energy density (42.8[Formula: see text]W[Formula: see text]h[Formula: see text]kg[Formula: see text] at 1249[Formula: see text]W[Formula: see text]kg[Formula: see text]). Therefore, the facile synthesis approach and superb electrochemical performance ensure that the walnut shells-derived porous carbon is a promising electrode material candidate for supercapacitors.

Fabrication of a CuCo2O4/PANI nanocomposite as an advanced electrode for high performance supercapacitors

2020 ◽  
Vol 4 (10) ◽  
pp. 5313-5326 ◽  
Author(s):  
S. Rajkumar ◽  
E. Elanthamilan ◽  
J. Princy Merlin ◽  
I. Jenisha Daisy Priscillal ◽  
I. Sharmila Lydia
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Electrode Material ◽  
High Performance ◽  
Low Cost ◽  
New Type ◽  
Energy Storage Applications

The as-synthesized CuCo2O4/PANI nanocomposite has emerged as a new type of electrode material for energy storage applications due to its low cost and sustainable and high electrochemical performance.

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