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 3D Porous Ti3C2 MXene/NiCo-MOF Composites for Enhanced Lithium Storage

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 695 ◽  
Author(s):  
Yijun Liu ◽  
Ying He ◽  
Elif Vargun ◽  
Tomas Plachy ◽  
Petr Saha ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
High Current Density ◽  
Composite Films ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Energy Storage Devices ◽  
Lithium Storage ◽  
Hierarchical Porous

To improve Li storage capacity and the structural stability of Ti3C2 MXene-based electrode materials for lithium-ion batteries (LIBs), a facile strategy is developed to construct three-dimensional (3D) hierarchical porous Ti3C2/bimetal-organic framework (NiCo-MOF) nanoarchitectures as anodes for high-performance LIBs. 2D Ti3C2 nanosheets are coupled with NiCo-MOF nanoflakes induced by hydrogen bonds to form 3D Ti3C2/NiCo-MOF composite films through vacuum-assisted filtration technology. The morphology and electrochemical properties of Ti3C2/NiCo-MOF are influenced by the mass ratio of MOF to Ti3C2. Owing to the interconnected porous structures with a high specific surface area, rapid charge transfer process, and Li+ diffusion rate, the Ti3C2/NiCo-MOF-0.4 electrode delivers a high reversible capacity of 402 mAh g−1 at 0.1 A g−1 after 300 cycles; excellent rate performance (256 mAh g−1 at 1 A g−1); and long-term stability with a capacity retention of 85.7% even after 400 cycles at a high current density, much higher than pristine Ti3C2 MXene. The results highlight that Ti3C2/NiCo-MOF have great potential in the development of high-performance energy storage devices.

scholarly journals SnS2 Nanocrystalline-Anchored Three-Dimensional Graphene for Sodium Batteries with Improved Rate Performance

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2336
Author(s):  
Li Zeng ◽  
Liping Zhang ◽  
Xingang Liu ◽  
Chuhong Zhang
Keyword(s):  
Porous Structure ◽  
Volume Expansion ◽  
Three Dimensional ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Sodium Ion ◽  
Discharge Process ◽  
Sodium Ion Batteries ◽  
Electrode Structure ◽  
Reduction Methods

Tin disulfide (SnS2) is regarded as one of the most suitable candidates as the electrode material for sodium-ion batteries (SIBs). However, the easy restacking and volume expansion properties of SnS2 during the charge/discharge process lead to the destruction of the electrode structure and a decrease in capacity. We successfully synthesized a SnS2 nanocrystalline-anchored three-dimensional porous graphene composite (SnS2/3DG) by combining hydrothermal and high-temperature reduction methods. The SnS2 nanocrystalline was uniformly dispersed within the connected reduced graphene oxide matrix. The SnS2/3DG battery showed a high reversible capacity of 430 mAh/g after 50 cycles at 100 mA/g. The SnS2/3DG composite showed an excellent rate capability with the current density increasing from 100 mA/g to 2 A/g. The excellent performance of the novel SnS2/3DG composite is attributed to the porous structure, which not only promoted the infiltration of electrolytes and hindered volume expansion for the porous structure, but also improved the conductivity of the whole electrode, demonstrating that the SnS2/3DG composite is a prospective anode for the next generation of sodium-ion batteries.

scholarly journals Three-Dimensional Carbon-Coated LiFePO4 Cathode with Improved Li-Ion Battery Performance

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1137
Author(s):  
Can Wang ◽  
Xunlong Yuan ◽  
Huiyun Tan ◽  
Shuofeng Jian ◽  
Ziting Ma ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Economic Benefits ◽  
Synthesis Process ◽  
Carbon Coated

LiFePO4 (LFPO)has great potential as the cathode material for lithium-ion batteries; it has a high theoretical capacity (170 m·A·h·g−1), high safety, low toxicity and good economic benefits. However, low conductivity and a low diffusion rate inhibit its future development. To overcome these weaknesses, three-dimensional carbon-coated LiFePO4 that incorporates a high capacity, superior conductivity and low volume expansion enables faster electron transport channels. The use of Cetyltrimethyl Ammonium Bromid (CTAB) modification only requires a simple water bath and sintering, without the need to add a carbon source in the LFPO synthesis process. In this way, the electrode shows excellent reversible capacity, as high as 159.8 m·A·h·g−1 at 2 C, superior rate capability with 97.3 m·A·h·g−1at 5 C and good cycling ability, preserving ~84.2% capacity after 500 cycles. By increasing the ion transport rate and enhancing the structural stability of LFPO nanoparticles, the LFPO-positive electrode achieves excellent initial capacity and cycle life through cost-effective and easy-to-implement carbon coating. This simple three-dimensional carbon-coated LiFePO4 provides a new and simple idea for obtaining comprehensive and high-performance electrode materials in the field of lithium cathode materials.

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 Single atom dispersion of silicon as advanced versatile electrode material

2020 ◽  
Author(s):  
Ze Yang ◽  
Yuwei Song ◽  
Chunfang Zhang ◽  
Jianjiang He ◽  
Xiaodong Li ◽  
...  
Keyword(s):  
Electrode Material ◽  
Volume Expansion ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Single Atom ◽  
Sodium Ion Battery ◽  
Prepared Material ◽  
High Utilization ◽  
Discharge Potential

Abstract Silicon (Si) exhibits highest theoretical charge capacity and low discharge potential, but the associated volume expansion cannot be neglected. Here we report a single atom dispersion strategy to prepare a well distributed Si single atom based electrode material, which can effectively inhibit the volume expansion even when the storage sites are fully occupied. The dispersion of Si single atoms are achieved by bonding Si atom with acetylenic carbon atom, forming a three-dimensional diamond-like skeleton. Owing to the combination of Si and diyne in the stable diamond-like skeleton, the as-prepared material, named as silicon-diamondyne (Si-DY), exhibits extraordinary electrochemical performance. Si-DY has been predicted to exhibit ultrahigh theoretical specific capacity of 3674 mA h g-1, 2810 mA h g-1, and 1945 mA h g-1 in lithium-ion battery (LIB), sodium-ion battery (SIB) and potassium-ion battery (KIB), respectively. Especially, the as-prepared Si-DY samples also achieve very stable measured specific capacity in LIB (2350 mA h g−1), SIB (812 mA h g-1) and KIB (512 mA h g-1), as well as ultra-long cycling stability (up to 5000 charge/discharge cycles). Those excellent results demonstrate the single atom dispersion technology of Si atoms can be an efficient way to prepare high-utilization Si based electrochemical materials.

Effect of Carbonaceous Materials on the Electrochemical Performance of Fe2O3/C as an Anode Material for Lithium-Ion Secondary Batteries

2015 ◽  
Vol 778 ◽  
pp. 83-87
Author(s):  
Dan Yang Su ◽  
Jing Wang ◽  
Wen Ping Tong ◽  
Xiao Shi Dong ◽  
Run Kai Zhou ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Research Field ◽  
X Ray Diffraction ◽  
High Specific Capacity ◽  
Dimensional Network ◽  
Oxide Anode

The iron oxide anode materials have attracted widespread attention in lithium-ion battery research field. The Fe2O3/C composite was synthesized via hydrothermal method and characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD confirmed that the main crystallization phases of materials were Fe2O3. The Fe2O3/AC powders showed very uniform cube between 1 and 2 μm. Fe2O3/CNTs composites acted as a three-dimensional network wiring to connect Fe2O3 spheres. The electrochemical investigation indicated that the electrochemical performance of Fe2O3/CNTs materials shows a high specific capacity and an excellent cycling stability. The first reversible capacity of samples is 808.8 mAhg-1 at the current density of 100 mAg-1 between 0.01 and 2.5 V vs. Li/Li+.

Three-dimensional NiCo2O4 nanowire arrays: preparation and storage behavior for flexible lithium-ion and sodium-ion batteries with improved electrochemical performance

2015 ◽  
Vol 3 (39) ◽  
pp. 19765-19773 ◽  
Author(s):  
Yudi Mo ◽  
Qiang Ru ◽  
Junfen Chen ◽  
Xiong Song ◽  
Lingyun Guo ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Nanowire Arrays ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Storage Behavior ◽  
And Storage ◽  
Good Rate Capability

The as-prepared 3D NCO@CFC nanowire arrays show high reversible capacity, excellent cycling stability, and good rate capability when used as an anode material for LIBs and SIBs.

scholarly journals The Positive Effect of ZnS in Waste Tire Carbon as Anode for Lithium-Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2178
Author(s):  
Xuechen Wang ◽  
Lu Zhou ◽  
Jianjiang Li ◽  
Na Han ◽  
Xiaohua Li ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
Carbon Anode ◽  
Waste Tire ◽  
Positive Effect

There is great demand for high-performance, low-cost electrode materials for anodes of lithium-ion batteries (LIBs). Herein, we report the recovery of carbon materials by treating waste tire rubber via a facile one-step carbonization process. Electrochemical studies revealed that the waste tire carbon anode had a higher reversible capacity than that of commercial graphite and shows the positive effect of ZnS in the waste tire carbon. When used as the anode for LIBs, waste tire carbon shows a high specific capacity of 510.6 mAh·g−1 at 100 mA·g−1 with almost 97% capacity retention after 100 cycles. Even at a high rate of 1 A·g−1, the carbon electrode presents an excellent cyclic capability of 255.1 mAh·g−1 after 3000 cycles. This high-performance carbon material has many potential applications in LIBs and provide an alternative avenue for the recycling of waste tires.

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.

Carbon aerogel/SnO2 as an advanced anode for sodium-ion batteries

2020 ◽  
Vol 13 (06) ◽  
pp. 2051026
Author(s):  
Ang Liao ◽  
Yong Pan ◽  
Weixin Lei ◽  
Zhenya Luo ◽  
Jiaqing Hu ◽  
...  
Keyword(s):  
Volume Expansion ◽  
High Performance ◽  
Active Material ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Carbon Aerogel ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Dimensional Network ◽  
Freeze Dried

As the anode of sodium-ion batteries (SIBs), SnO2 has been attracted considerable attention due to its high theoretical specific capacity. However, these shortcomings of SnO2 anode seriously restrict its practical use for high-performance SIBs due to its poor conductivity, volume expansion and agglomeration of the active material during cycling. In this paper, carbon aerogel (CA) is a three-dimensional porous material with glucose as carbon source and freeze-dried hydrogel method is used to retain three-dimensional network structure by calcination. SnO2 is prepared by hydrothermal method with nanoparticles and distributed on the CA homogeneously to prepare CA/SnO2. The CA/SnO2 is prepared for SIB, in which CA can alleviate the problem of volume expansion and improve poor conductivity of SnO2 as a good carrier. Moreover, the porous structure of CA is beneficial to increase the contact between the electrolyte and the electrode, and accelerates the transmission speed of ions and electrons. Nano-sized SnO2 also contributes to cycle stability. The CA/SnO2 exhibits superior electrochemical performance and maintains a reversible discharge specific capacity of 235[Formula: see text]mAh[Formula: see text]g[Formula: see text] at a current density of 50[Formula: see text]mA[Formula: see text]g[Formula: see text] after 100 cycles.

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