scholarly journals Solid-State Synthesis of Layered MoS2 Nanosheets with Graphene for Sodium-Ion Batteries

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 660
Author(s):  
Ujjwala Chothe ◽  
Chitra Ugale ◽  
Milind Kulkarni ◽  
Bharat Kale

Sodium-ion batteries have potential as energy-storage devices owing to an abundant source with low cost. However, most electrode materials still suffer from poor conductivity, sluggish kinetics, and huge volume variation. It is still challenging to explore apt electrode materials for sodium-ion battery applications to avoid the pulverization of electrodes induced by reversible intercalation of large sodium ions. Herein, we report a single-step facile, scalable, low-cost, and high-yield approach to prepare a hybrid material; i.e., MoS2 with graphene (MoS2-G). Due to the space-confined effect, thin-layered MoS2 nanosheets with a loose stacking feature are anchored with the graphene sheets. The semienclosed hybrid architecture of the electrode enhances the integrity and stability during the intercalation of Na+ ions. Particularly, during galvanostatic study the assembled Na-ion cell delivered a specific capacity of 420 mAhg−1 at 50 mAg−1, and 172 mAhg−1 at current density 200 mAg−1 after 200 cycles. The MoS2-G hybrid excels in performance due to residual oxygen groups in graphene, which improves the electronic conductivity and decreases the Na+ diffusion barrier during electrochemical reaction, in comparison with a pristine one.

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1074 ◽  
Author(s):  
Pier Paolo Prosini ◽  
Maria Carewska ◽  
Cinzia Cento ◽  
Gabriele Tarquini ◽  
Fabio Maroni ◽  
...  

A tin-decorated reduced graphene oxide, originally developed for lithium-ion batteries, has been investigated as an anode in sodium-ion batteries. The composite has been synthetized through microwave reduction of poly acrylic acid functionalized graphene oxide and a tin oxide organic precursor. The final product morphology reveals a composite in which Sn and SnO2 nanoparticles are homogenously distributed into the reduced graphene oxide matrix. The XRD confirms the initial simultaneous presence of Sn and SnO2 particles. SnRGO electrodes, prepared using Super-P carbon as conducting additive and Pattex PL50 as aqueous binder, were investigated in a sodium metal cell. The Sn-RGO showed a high irreversible first cycle capacity: only 52% of the first cycle discharge capacity was recovered in the following charge cycle. After three cycles, a stable SEI layer was developed and the cell began to work reversibly: the practical reversible capability of the material was 170 mA·h·g−1. Subsequently, a material of formula NaLi0.2Ni0.25Mn0.75O was synthesized by solid-state chemistry. It was found that the cathode showed a high degree of crystallization with hexagonal P2-structure, space group P63/mmc. The material was electrochemically characterized in sodium cell: the discharge-specific capacity increased with cycling, reaching at the end of the fifth cycle a capacity of 82 mA·h·g−1. After testing as a secondary cathode in a sodium metal cell, NaLi0.2Ni0.25Mn0.75O was coupled with SnRGO anode to form a sodium-ion cell. The electrochemical characterization allowed confirmation that the battery was able to reversibly cycle sodium ions. The cell’s power response was evaluated by discharging the SIB at different rates. At the lower discharge rate, the anode capacity approached the rated value (170 mA·h·g−1). By increasing the discharge current, the capacity decreased but the decline was not so pronounced: the anode discharged about 80% of the rated capacity at 1 C rate and more than 50% at 5 C rate.


Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1952 ◽  
Author(s):  
Santanu Mukherjee ◽  
Shakir Bin Mujib ◽  
Davi Soares ◽  
Gurpreet Singh

Sodium ion batteries (SIBs) are being billed as an economical and environmental alternative to lithium ion batteries (LIBs), especially for medium and large-scale stationery and grid storage. However, SIBs suffer from lower capacities, energy density and cycle life performance. Therefore, in order to be more efficient and feasible, novel high-performance electrodes for SIBs need to be developed and researched. This review aims to provide an exhaustive discussion about the state-of-the-art in novel high-performance anodes and cathodes being currently analyzed, and the variety of advantages they demonstrate in various critically important parameters, such as electronic conductivity, structural stability, cycle life, and reversibility.


Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2567 ◽  
Author(s):  
Qinglan Zhao ◽  
Andrew Whittaker ◽  
X. Zhao

Sodium-ion batteries are promising alternative electrochemical energy storage devices due to the abundance of sodium resources. One of the challenges currently hindering the development of the sodium-ion battery technology is the lack of electrode materials suitable for reversibly storing/releasing sodium ions for a sufficiently long lifetime. Redox-active polymers provide opportunities for developing advanced electrode materials for sodium-ion batteries because of their structural diversity and flexibility, surface functionalities and tenability, and low cost. This review provides a short yet concise summary of recent developments in polymer electrode materials for sodium-ion batteries. Challenges facing polymer electrode materials for sodium-ion batteries are identified and analyzed. Strategies for improving polymer electrochemical performance are discussed. Future research perspectives in this important field are projected.


2017 ◽  
Vol 7 ◽  
pp. 130-151 ◽  
Author(s):  
Yunming Li ◽  
Yaxiang Lu ◽  
Chenglong Zhao ◽  
Yong-Sheng Hu ◽  
Maria-Magdalena Titirici ◽  
...  

2017 ◽  
Vol 5 (27) ◽  
pp. 13882-13906 ◽  
Author(s):  
Weihan Li ◽  
Minsi Li ◽  
Keegan R. Adair ◽  
Xueliang Sun ◽  
Yan Yu

Carbon nanofibers (CNFs) belong to a class of one-dimensional (1D) carbonaceous materials with excellent electronic conductivity, leading to their use as conductive additives in electrode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (NIBs).


2018 ◽  
Vol 11 (06) ◽  
pp. 1840002 ◽  
Author(s):  
Depeng Zhao ◽  
Di Xie ◽  
Hengqi Liu ◽  
Fang Hu ◽  
Xiang Wu

With the rise of flexible electronics, flexible rechargeable batteries have attracted widespread attention as a promising power source in new generation flexible electronic devices. In this work, [Formula: see text]-Fe2O3 nanorods grown on carbon cloth have been synthesized through a facile hydrothermal method as binder-free electrode material. The electrochemical performance measurements show that [Formula: see text]-Fe2O3 nanorods possess high specific capacitance and specific capacity retention of 119% after 100 cycles. The combination of low-cost and excellent electrochemical performance makes [Formula: see text]-Fe2O3 nanorods promising anode materials for sodium-ion batteries.


Author(s):  
Kei Kubota ◽  
Masahiro Miyazaki ◽  
Eun Jeong Kim ◽  
Hiroaki Yoshida ◽  
Prabeer Barpanda ◽  
...  

Sodium-ion batteries can be designed as a low-cost alternative to lithium-ion batteries, where various layered transition metal oxides are frontrunner positive electrode materials. Owing to the inexpensive and abundant Mn...


2018 ◽  
Vol 11 (04) ◽  
pp. 1850072 ◽  
Author(s):  
Jifei Liu ◽  
Jianfeng Dai ◽  
Liangbiao Huang ◽  
Bi Fu

Transition metal oxides applied as anode material for sodium-ion batteries have been widely investigated due to their high specific capacity, especially for Co3O4-related nanomaterials. However, its intrinsic low electronic conductivity and the aggregation phenomenon of commercial Co3O4 nanoparticles result in a low initially coulombic efficiency and the fading of cycle performance. In this paper, commercial Co3O4 nanoparticles/carbon composite nanofiber mats were synthesized by sol–gel electrospinning. When directly applied, such flexible negative electrodes as sodium-ion batteries, revealed high specific capacity and excellent rate performance simultaneously, which are not only attributed to the high electronic conductivity of carbon nanofiber mats that could enhance the ionic and electronic transport property, but also attributed to its three-dimensional fibrous network that could prevent the aggregation of commercial Co3O4 nanoparticles. Such a flexible, binder-free and high electronic conductivity negative electrode enables promising applications for large-scale energy storage and conversion.


RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 53129-53154 ◽  
Author(s):  
Monica Sawicki ◽  
Leon L. Shaw

Na3MnCO3PO4 offers a specific capacity of 176.7 mA h g−1, reaching 92.5% of its theoretical if electronic conductivity is sufficient.106


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