scholarly journals A Novel Open-Framework Cu-Ge-Based Chalcogenide Anode Material for Sodium-Ion Battery

Scanning ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Quan Sun ◽  
Lin Fu ◽  
Chaoqun Shang
Keyword(s):  
Electrode Materials ◽  
Reversible Capacity ◽  
Sodium Ion ◽  
Electrochemical Performances ◽  
Open Framework ◽  
Energy Storage Application ◽  
Potential Electrode ◽  
Fast Ion ◽  
First Time ◽  
Promising Electrode Material

Open-framework chalcogenides are potential electrode materials for sodium-ion batteries (SIBs) due to their architectures with fast-ion conductivity. Herein, we report on the successful synthesis of open-framework Cu-Ge-based chalcogenides [Cu8Ge6Se19](C5H12N)6 (CGSe) and the research of their energy storage application as SIB anodes for the first time. As a result, the CGSe anode exhibited good electrochemical performances such as high reversible capacity (463.3 mAh g−1), excellent rate performance, and considerable cycling stability. Our exploration not only develops a promising electrode material for SIBs, but also extends the application of open-framework chalcogenides.

Phosphorus Doping Induced the Co-Construction of Sulfur Vacancies and Heterojunctions in Tin Disulfide as a Durable Anode for Lithium/Sodium-Ion Batteries

2022 ◽  
Author(s):  
Zhen Kong ◽  
Meiling Huang ◽  
Zhenyan Liang ◽  
Huayao Tu ◽  
Kang Zhang ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Sodium Ion ◽  
Electrochemical Performances ◽  
Sodium Ion Batteries ◽  
Phosphorus Doping ◽  
Sulfur Vacancy ◽  
Tin Disulfide ◽  
Promising Strategy

The reasonable design of electrode materials with heterojunction and vacancy is a promising strategy to elevate its electrochemical performances. Herein, tin-based sulfide composites with heterojunction and sulfur vacancy encapsulated by...

Theoretical investigation of capacitances in functionalized MXene supercapacitors Mn+1CnO2,M=Ti,V,Nb,Mo

2021 ◽  
Author(s):  
Mandira Das ◽  
Subhradip Ghosh
Keyword(s):  
First Principles ◽  
Electrode Materials ◽  
Systematic Investigation ◽  
Atomic Scale ◽  
Electrochemical Performances ◽  
Two Dimensional ◽  
Complete Understanding ◽  
Potential Electrode ◽  
Two Dimensional Materials ◽  
Electronic Structure Methods

Abstract MXene, the class of two-dimensional materials, has been found to be useful as potential electrode materials for electrochemical capacitors. Although experimental investigation on the electrochemical performances of a few MXenes have been carried out with exciting results, a complete understanding of their atomic scale behaviour is yet to be done. Using first-principles electronic structure methods, we perform a systematic investigation of the capacitances in pristine and functionalised MXenes Mn+1CnO2 where M = T i, V, Nb and Mo. We provide results on each of the three sources of the capacitance and analyse them in detail for a complete understanding of their behaviour. The inter-pretation of the experimental results, wherever available, in the light of our computations,provides useful insights.

scholarly journals Three-Dimensional Porous Graphene Supported MoS2 Nanoflower Prepared by a Facile Solvothermal Method with Excellent Rate Performance and Sodium-Ion Storage

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2134 ◽  
Author(s):  
Li Zeng ◽  
Liping Zhang ◽  
Xingang Liu ◽  
Chuhong Zhang
Keyword(s):  
Volume Expansion ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Sodium Ion ◽  
Superior Performance ◽  
Step Method ◽  
Porous Graphene

Sodium-ion batteries (SIBs), as a supplement of lithium-ion batteries (LIBs), are attracting intensive research interest due to their low cost and abundance. Molybdenum disulfide (MoS2) is regarded as a suitable candidates for SIBs electrode materials, which suffer from prominent volume expansion and poor conductivity. In this study, three-dimensional porous graphene composites loaded with MoS2 were prepared via a facile two-step method. The MoS2 nanoflower particles were uniformly dispersed within the layered graphene matrix, and a three-dimensional porous graphene supported MoS2 nanoflower battery (MoS2/3DG) was demonstrated to have superior performance to that of the pristine pure MoS2 nanoflower battery. At a current density of 100 mA/g, the MoS2/3DG delivered a reversible capacity of 420 mAh/g. What is more, it yielded a reversible specific capacity of 310 mAh/g at 2 A/g, showing an excellent rate of 73.8%. The excellent performance of the novel MoS2/3DG composite are attributed to the promoted infiltration of electrolytes and the hindered volume expansion for the porous structure, good conductivity, and robust mechanical properties of graphene.

scholarly journals Nano Hard Carbon Anodes for Sodium-Ion Batteries

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 793 ◽  
Author(s):  
Dae-Yeong Kim ◽  
Dong-Hyun Kim ◽  
Soo-Hyun Kim ◽  
Eun-Kyung Lee ◽  
Sang-Kyun Park ◽  
...  
Keyword(s):  
Carbon Material ◽  
Electrode Materials ◽  
Coulombic Efficiency ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Amorphous Structure ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Intercalation Reaction

A hindrance to the practical use of sodium-ion batteries is the lack of adequate anode materials. By utilizing the co-intercalation reaction, graphite, which is the most common anode material of lithium-ion batteries, was used for storing sodium ion. However, its performance, such as reversible capacity and coulombic efficiency, remains unsatisfactory for practical needs. Therefore, to overcome these drawbacks, a new carbon material was synthesized so that co-intercalation could occur efficiently. This carbon material has the same morphology as carbon black; that is, it has a wide pathway due to a turbostratic structure, and a short pathway due to small primary particles that allows the co-intercalation reaction to occur efficiently. Additionally, due to the numerous voids present in the inner amorphous structure, the sodium storage capacity was greatly increased. Furthermore, owing to the coarse co-intercalation reaction due to the surface pore structure, the formation of solid-electrolyte interphase was greatly suppressed and the first cycle coulombic efficiency reached 80%. This study shows that the carbon material alone can be used to design good electrode materials for sodium-ion batteries without the use of next-generation materials.

scholarly journals Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

2018 ◽  
Vol 8 (3) ◽  
pp. 32
Author(s):  
Peiyuan Ji ◽  
Yi Xi ◽  
Chengshuang Zhang ◽  
Chuanshen Wang ◽  
Chenguo Hu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Diffusion Path ◽  
Electrochemical Performances ◽  
Wet Chemistry ◽  
First Time ◽  
Charge Discharge

Porous materials have superior electrochemical performance owing to its their structure, which could increase the specific and contact area with the electrode. The spinel Li4Mn5O12 has a three-dimensional tunnel structure for a better diffusion path, which has the advantage of lithium ion insertion and extraction in the framework. However, multi-space spherical materials with single morphologies are rarely studied. In this work, waxberry-like and raspberry-like nanospheres for Li4Mn5O12 have been fabricated by the wet chemistry and solid-state methods for the first time. The diameter of a single waxberry- and raspberry-like nanosphere is about 1 μm and 600 nm, respectively. The specific capacitance of Li4Mn5O12 was 535 mF cm−2 and 147.25 F g−1 at the scan rate of 2 mV s−1, and the energy density was 110.7 Wh kg−1, remaining at 70% after 5000th charge-discharge cycles. Compared with raspberry-like nanosphere Li4Mn5O12, the waxberry-like nanoporous spinel Li4Mn5O12 shows the better electrochemical performance and stability; furthermore, these electrochemical performances have been improved greatly compared to the previous studies. All these results indicate that the waxberry-like nanoporous spinel Li4Mn5O12 could provide a potential application in high performance supercapacitors.

scholarly journals Binder and Conductive Diluents Free NaVPO4F Based Free-standing Positive Electrodes for Sodium-Ion Batteries

2022 ◽  
Author(s):  
V Kiran Kumar ◽  
Sourav Ghosh ◽  
Naresh Vangapally ◽  
Govind Ummethala ◽  
Sai Rama Krishna Malladi ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Electrochemical Performance ◽  
Carbon Matrix ◽  
Aluminum Foil ◽  
Reversible Capacity ◽  
Sodium Ion ◽  
Electrochemical Performances ◽  
Petroleum Pitch ◽  
Sodium Ion Batteries ◽  
Free Standing

Abstract Herein, we report a carbon-fiber based freestanding electrode for NaVPO4F cathodes in sodium-ion batteries. The replacement of conventional aluminum foil with a carbon fiber mat-based current collector results in significant improvement in capacity at high rates and charge-discharge cycle stability. Petroleum-pitch (P-Pitch) has dual functions. P-pitch is used as a binder to bind NaVPO4F particles onto the carbon fiber mat, which helps to eliminate typical organic binders. At the same time, P-Pitch acts as a conducting precursor to coat onto NaVPO4F particles. The amount of P-pitch required to achieve stable electrochemical performance is optimized. As a result, 15 and 20 % of P-pitch in the composite NaVPO4F electrodes (15P_NVPF@CF and 20P_NVPF@CF) shows stable electrochemical performances. A reversible capacity of 120 and 119 mAh g−1 are observed for 15P_NVPF@CF and 20P_NVPF@CF, with 97 and 98 % retention in capacity after 300 cycles, respectively. Further, at a 0.5 C current rate, 15P_NVPF@CF and 20P_NVPF@CF electrodes show 86 and 87 % capacity retention after 1000 cycles. The significant electrochemical performance of these freestanding electrodes is ascribed to the interlinked carbon matrix with NaVPO4F particles and carbon-fiber mat, which provides a continuous path for electronic conduction and faster kinetics of NaVPO4F particles

Microtubular Hard Carbon Derived From Willow Catkins as an Anode Material With Enhanced Performance for Sodium-Ion Batteries

2018 ◽  
Vol 15 (4) ◽  
Author(s):  
Yongqiang Teng ◽  
Maosong Mo ◽  
Yuan Li
Keyword(s):  
Anode Material ◽  
Electrode Materials ◽  
Economic Value ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Hard Carbon ◽  
N Doping

As a kind of common bio-waste, willow catkin is of no economic value. But it is surprising that it can be an ideal carbonaceous source and bio-template for electrode materials of lithium-ion batteries and supercapacitors. Herein, we demonstrate that microtubular hard carbon can be derived from willow catkins and used as an anode of sodium-ion batteries (SIBs). The sample obtained from carbonization at 1000 °C delivers a high reversible capacity of 210 mAh g−1, good rate capability, and excellent cycling stability (112 mAh g−1 at 1000 mA g−1 after 1600 cycles) due to its unique tubular structure and the N-doping characteristic. The present work affords a new candidate for the production of hard carbon materials with tubular microstructure using natural biomass, and develops a highly promising anode material for SIBs.

scholarly journals TiO2–Fe2O3 nanocomposites as high-capacity negative electrode materials for rechargeable sodium-ion batteries

2017 ◽  
Vol 1 (2) ◽  
pp. 371-376 ◽  
Author(s):  
C. S. Ding ◽  
T. Nohira ◽  
R. Hagiwara
Keyword(s):  
Electrode Materials ◽  
High Capacity ◽  
Negative Electrode ◽  
Reversible Capacity ◽  
Liquid Electrolyte ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Ionic Liquid Electrolyte ◽  
Negative Electrodes ◽  
Negative Electrode Materials

TiO2–Fe2O3 negative electrodes deliver a high reversible capacity exceeding 360 mA h g−1 in an ionic liquid electrolyte at 363 K.

High-rate potassium ion and sodium ion batteries by co-intercalation anodes and open framework cathodes

Nanoscale ◽  
2018 ◽  
Vol 10 (28) ◽  
pp. 13335-13342 ◽  
Author(s):  
Kathleen Moyer ◽  
Jennifer Donohue ◽  
Neha Ramanna ◽  
Adam P. Cohn ◽  
Nitin Muralidharan ◽  
...  
Keyword(s):  
Metal Ion ◽  
Sodium Ion ◽  
High Rate ◽  
Sodium Ion Batteries ◽  
Ion Diffusion ◽  
Open Framework ◽  
Power Cycling ◽  
Battery Design ◽  
Fast Charging ◽  
Fast Ion

A fast-charging full-cell battery design is demonstrated with ultrafast metal ion co-intercalation at the anode and fast ion diffusion through an open framework cathode to enable high power cycling with energy densities ∼100 W h kg−1.

scholarly journals Cycling properties of Na3V2(PO4)2F3 as positive material for sodium-ion batteries

Ionics ◽  
2021 ◽  
Vol 27 (5) ◽  
pp. 1853-1860
Author(s):  
Nicolò Pianta ◽  
Davide Locatelli ◽  
Riccardo Ruffo
Keyword(s):  
Electrode Materials ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Scale Up ◽  
Negative Electrode ◽  
Sodium Ion ◽  
High Rate ◽  
Electrochemical Performances ◽  
Metallic Sodium ◽  
Free Standing

AbstractThe research into sodium-ion battery requires the development of high voltage cathodic materials to compensate for the potential of the negative electrode materials which is usually higher than the lithium counterparts. In this framework, the polyanionic compound Na3V2(PO4)2F3 was prepared by an easy-to-scale-up carbothermal method and characterized to evaluate its electrochemical performances in half cell vs. metallic sodium. The material shows a specific capacity (115 mAh g−1) close to the theoretical limit, good coulombic efficiency (>99%) and an excellent stability over several hundred cycles at high rate. High-loading free-standing electrodes were also tested, which showed interesting performances in terms of areal capacity and cyclability.

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