Long-cycle and high-rate electrochemical performance of expanded graphite cathode materials with two-stage aluminum storage mechanism

2021 ◽  
Author(s):  
chunyan yang ◽  
yunlong ma ◽  
xiaoqiong feng ◽  
hong ning ◽  
shiying zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Electrode Materials ◽  
Graphite Electrode ◽  
Expanded Graphite ◽  
High Rate ◽  
Two Stage ◽  
Graphite Cathode ◽  
Storage Mechanism ◽  
Long Cycle

Graphite materials are of increasing interest as alternative cathodes for Aluminum-graphite batteries (AGBs) owing to their low fabrication price and rich resource. The development and design of graphite electrode materials...

Highly ordered nanoscale phosphomolybdate-grafted polyaniline/metal hybrid layered structures prepared via secondary sputtering phenomenon as high-performance pseudocapacitor electrodes

2021 ◽  
Author(s):  
Eun Seop Yoon ◽  
Bong Gill Choi ◽  
Hwan-Jin Jeon
Keyword(s):  
Electron Transfer ◽  
Aspect Ratio ◽  
Electrochemical Performance ◽  
High Aspect Ratio ◽  
High Performance ◽  
Electrode Materials ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
High Rate ◽  
Large Area

Abstract The development of energy storage electrode materials is important for enhancing the electrochemical performance of supercapacitors. Despite extensive research on improving electrochemical performance with polymer-based materials, electrode materials with micro/nanostructures are needed for fast and efficient ion and electron transfer. In this work, highly ordered phosphomolybdate (PMoO)-grafted polyaniline (PMoO-PAI) deposited onto Au hole-cylinder nanopillar arrays is developed for high-performance pseudocapacitors. The three-dimensional nanostructured arrays are easily fabricated by secondary sputtering lithography, which has recently gained attention and features a high resolution of 10 nm, a high aspect ratio greater than 20, excellent uniformity/accuracy/precision, and compatibility with large area substrates. These 10nm scale Au nanostructures with a high aspect ratio of ~30 on Au substrates facilitate efficient ion and electron transfer. The resultant PMoO-PAI electrode exhibits outstanding electrochemical performance, including a high specific capacitance of 114 mF/cm2, a high-rate capability of 88%, and excellent long-term stability.

scholarly journals Research Progress of Cathode Materials for Lithium-ion Batteries

2021 ◽  
Vol 233 ◽  
pp. 01020
Author(s):  
Kaijia Lu ◽  
Chuanshan Zhao ◽  
Yifei Jiang
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Research Progress ◽  
Energy Storage Materials ◽  
Factors Affecting ◽  
New Energy ◽  
Oxide Spinel

Lithium-ion batteries have attracted widespread attention as new energy storage materials, and electrode materials, especially cathode materials, are the main factors affecting the electrochemical performance of lithium-ion batteries, and they also determine the cost of preparing lithium-ion batteries. In recent years, there have been a lot of researches on the selection and modification of cathode materials based on lithium-ion batteries to continuously optimize the electrochemical performance of lithium-ion batteries. This article introduces the research progress of cathode materials for lithium ion batteries, including three types of cathode materials (layer oxide, spinel oxide, polyanionic compound) and three modification methods (doping modification, surface coating modification, nano modification method), and prospects for the future development of lithium ion battery cathode materials.

Ultra-high-rate, ultra-long-life asymmetric supercapacitors based on few-crystalline, porous NiCo2O4 nanosheet composites

2018 ◽  
Vol 6 (4) ◽  
pp. 1412-1422 ◽  
Author(s):  
Long Zhang ◽  
Lei Dong ◽  
Mengxiong Li ◽  
Peng Wang ◽  
Jiajia Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cycle Life ◽  
High Rate ◽  
Asymmetric Supercapacitors ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Long Life

A few-crystalline, porous NiCo2O4 nanosheet composite (FCP-NiCo2O4/RGO/CNTs) has been synthesized and it exhibits superior electrochemical performance for asymmetric supercapacitors, especially in terms of ultra-high-rate and ultra-long cycle life.

scholarly journals P2- a2=3Mn2=3M1=3O2 (M = Fe, Co, Ni) cathode materials in localized high concentration electrolyte for the long-cycling performance of sodium-ion batteries

2021 ◽  
Vol 24 (2) ◽  
pp. first
Author(s):  
Kha Minh Le ◽  
Huynh Thi Kim Tuyen ◽  
Thanh Duy Vo ◽  
Hoang Van Nguyen ◽  
Nhan Thanh Tran ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Electrode Materials ◽  
Rietveld Method ◽  
Synergistic Effects ◽  
Cycling Performance ◽  
Molar Ratio ◽  
Potential Range ◽  
High Concentration ◽  
Dendrite Formation

Introduction: Localized high concentration electrolytes (LHCE) have been intensively studied due to their unique properties, especially in suppressing the Na dendrite formation and long-term cycling. Therefore, the low electrochemical performance of the P2-type cathode can be overcome by using LHCE. Methods: P2-type sodium layered oxides Na2=3Mn2=3M1=3O2 (M = Fe, Co, Ni) cathode materials were synthesized via a simple co-precipitation following a supported solid-state reaction. XRD and Rietveld method analyzed the phase composition and lattice parameters. SEM images observed the morphology of materials. The half-cell of three cathode were performed in LHCE consisting of 2.1 M sodium bis(fluorosulfonyl)imide (NaFSI) dissolved in 1,2-dimethoxyethane (DME) and bis(2,2,2-trifluoroethyl) ether (BTFE) (solvent molar ratio 1:2). The galvanostatic charge-discharge, striping-plating, and linear sweep voltage tests were carried out to investigate the electrochemical behaviors. Results: As-prepared electrode materials exhibited discharge capacities of 94.5, 147.1, and 142.9 mAh/g at C/10 in the potential range of 1.5-4.2 V for Na2=3Mn2=3Fe1=3O2 (MFO), Na2=3Mn2=3Co1=3O2 (MCO) and Na2=3Mn2=3Ni1=3O2 (MNO), respectively. Interestingly, the MNO cathode material has a superior cycling performance with 86.5% capacity retention after 100 cycles than MCO and MFO. Conclusion: Such superior electrochemical performance of synthesized MNO could be ascribed to the combined synergistic effects between the nickel partially substituted MNO cathode structure and using LHCE 2.1 M NaFSI/DME-BTFE (1:2). Nickel substituted MNO cathode exhibited the enhancement of discharge capacity and the long cycling stability in LHCE due to the mitigation of dendrite formation on sodium metal anode.

scholarly journals Battery-Supercapacitor Hybrids: A Literature Review

2021 ◽  
Author(s):  
Praanav Lodha
Keyword(s):  
Energy Storage ◽  
Literature Review ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Charge Storage ◽  
Storage Mechanism ◽  
Different Types ◽  
Charge Storage Mechanism

<p>This literature review explains the construction and charge storage mechanisms in Lithium-ion batteries. Further, it elaborates on the electrode reactions in Lithium-ion batteries, and commonly used electrode materials and their structures. Different types of Lithium-based batteries’ electrochemical performance were compared, in addition to other relevant differentiators. The energy storage mechanism in Supercapacitors is briefly touched upon – and the electrochemical performance of supercapacitors is compared with that of lithium-ion batteries. Battery supercapacitor hybrids are introduced, with a brief section on their development over the past two decades following explanations of the charge storage mechanism and construction of battery supercapacitor hybrids. Battery supercapacitor hybrids are then compared with existing electrochemical energy storage mechanisms and finally, two types of battery supercapacitor hybrids were discussed.</p>

K-ions intercalated V6O13 with advanced high-rate long-cycle performance as cathode for Zn-ion batteries

2021 ◽  
Author(s):  
Qihao Chen ◽  
Zhiqiang Luo ◽  
Xudong Zhao
Keyword(s):  
Energy Storage ◽  
Cathode Materials ◽  
Large Scale ◽  
Low Cost ◽  
High Rate ◽  
Cycle Performance ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Long Cycle

Aqueous Zn-ion batteries (AZIBs) are regarded as potential candidates for large-scale energy storage devices due to their low cost, high safety, and abundant Zn resources. The cathode materials of AZIBs...

One-Dimensional Porous TiNb2O7–Carbon Nanofiber Arrays as High-Performance Anode for Lithium Ion Batteries

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Meili Qi ◽  
Hengxu Wang ◽  
Jinghua Yin
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Carbon Nanofiber ◽  
Lithium Ion ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Capacity Retention ◽  
Porous Carbon Nanofiber

Abstract High-energy density lithium ion batteries (LIBs) rely heavily on innovations of electrode materials. Herein, the porous TiNb2O7/carbon nanofibers (TNO/CNFs) have been prepared through the hydrothermal method and electrostatic spinning method as the anode for the Li-ion battery. The structure of porous TNO/CNFs after annealing at 700 °C for 2 h is intact, and lots of holes are found on that surface of nanofibers. Porous TNO/CNFs as the anode show better electrochemical performance than TNO/CNFs, the capacity retention of porous TNO/CNFs is 81.6% (147 mA h/g) with an exceptionally high rate (at 20 C rate). And the capacity retention of porous TNO/CNFs is higher than ≈77% that of TNO/CNFs (112 mA h/g). The superior electrochemical performance of these porous TNO/CNFs can be attributed to the unique porous carbon nanofiber structure: this structure of porous nanofibers not only provides a larger effective area for contact with the electrolyte but also reduces the rate-limiting Li diffusion path, leading to faster charge transfer.

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