scholarly journals Nanobelts-constructed Porous TiO2-B@SnS2 Heterostructure Hybrids for Enhance Lithium Storage Performance

2021 ◽  
Author(s):  
Chao Cai ◽  
Meiyu Song ◽  
Qixiang Ou ◽  
Jianmei Li ◽  
changsheng an
Keyword(s):  
Active Sites ◽  
Electrode Materials ◽  
Theoretical Calculations ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Electrode Structure ◽  
Lithium Storage ◽  
Volume Collapse ◽  
Alloy Type

Abstract Alloy-type anodes materials possess broad prospects for excellent electrochemical property lithium-ion batteries owing to its high theoretical capacity and excellent electronic conductivity. However, this type electrode materials experience poor kinetics and tremendous volume collapse during the repeated lithiation-delithiation process. Herein, an efficient method to provide a fast transmission channel and suppress the volume collapse during the discharge/charge process by constructing the heterostructure between porous TiO2-B nanoblets and few-layer SnS2 nanosheets interface, which provides high-active sites for the nucleation and growth of SnS2 nanosheets, and inhibits the agglomeration of SnS2 nanosheets. Both experimental results and theoretical calculations definite that porous TiO2 nanobelts provides more chemical active sites for the adsorption and transmission of lithium ion and then effectively improve the stability the electrode structure. As a result, TiO2-B@SnS2 hybrid exhibits excellent rate and cycle performance. This work paves a way to design and construction of high performance alloy-type anode materials.

scholarly journals Facile Synthesis of Sn/Nitrogen-Doped Reduced Graphene Oxide Nanocomposites with Superb Lithium Storage Properties

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1084 ◽  
Author(s):  
Quan Sun ◽  
Ying Huang ◽  
Shi Wu ◽  
Zhonghui Gao ◽  
Hang Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Active Sites ◽  
Electronic Conductivity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Discharge Process ◽  
Lithium Storage ◽  
Nitrogen Doped ◽  
Reduced Graphene

Sn/Nitrogen-doped reduced graphene oxide (Sn@N-G) composites have been successfully synthesized via a facile method for lithium-ion batteries. Compared with the Sn or Sn/graphene anodes, the Sn@N-G anode exhibits a superb rate capability of 535 mAh g−1 at 2C and cycling stability up to 300 cycles at 0.5C. The improved lithium-storage performance of Sn@N-G anode could be ascribed to the effective graphene wrapping, which accommodates the large volume change of Sn during the charge–discharge process, while the nitrogen doping increases the electronic conductivity of graphene, as well as provides a large number of active sites as reservoirs for Li+ storage.

Co3O4/porous carbon nanofibers composite as anode for high-performance lithium ion batteries with improved cycle performance and lithium storage capacity

2016 ◽  
Vol 51 (3) ◽  
pp. 315-322 ◽  
Author(s):  
Hongxun Yang ◽  
Yang Wang ◽  
Yu Nie ◽  
Shengnan Sun ◽  
Tongyi Yang
Keyword(s):  
Lithium Ion Batteries ◽  
Carbon Nanofibers ◽  
Porous Carbon ◽  
Storage Capacity ◽  
Electronic Conductivity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Lithium Storage ◽  
Capacity Retention

Co3O4 is a promising candidate as an anode material for the next generation lithium ion batteries because of its high theoretical storage capacity and energy density. However, the disadvantages of poor capacity retention caused by large volume changes during cycling and low rate capability due to its poor electronic conductivity frustrate its practical applications. We have developed a binary nanocomposite based on Co3O4 and porous carbon nanofibers synthesized via an electrospinning method followed by thermal treatment. As an anode for lithium ion batteries, the Co3O4/ porous carbon nanofibers composite exhibits a remarkably improved electrochemical performance in terms of lithium storage capacity (869.5 mAh g−1 at 0.1 C), high-initial Coulombic efficiency (73.8%), cycling stability (94.9% capacity retention at 50 cycles), and rate capability (403.6 mAh g−1 at 2 C at 25 cycles) compared to pure Co3O4. This improvement is attributed to the introduction of porous carbon nanofibers which could improve electrical conductivity of material and accommodate the volume expansion/contraction of Co3O4 nanoparticles during cycling.

scholarly journals Recent Progress of TiO2-Based Anodes for Li Ion Batteries

2016 ◽  
Vol 2016 ◽  
pp. 1-15 ◽  
Author(s):  
Yu Liu ◽  
Yefeng Yang
Keyword(s):  
Energy Storage ◽  
Active Sites ◽  
Recent Progress ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Energy Storage And Conversion ◽  
Ion Diffusion ◽  
Lithium Storage ◽  
Storage Mechanism ◽  
Li Ion

TiO2-based materials have been widely studied in the field of photocatalysis, sensors, and solar cells. Besides that, TiO2-based materials are of great interest for energy storage and conversion devices, in particular rechargeable lithium ion batteries (LIBs). TiO2has significant advantage due to its low volume change (<4%) during Li ion insertion/desertions process, short paths for fast lithium ion diffusion, and large exposed surface offering more lithium insertion channels. However, the relatively low theoretical capacity and electrical conductivity of TiO2greatly hampered its practical application. Various strategies have been developed to solve these problems, such as designing different nanostructured TiO2to improve electronic conductivity, coating or combining TiO2with carbonaceous materials, incorporating metal oxides to enhance its capacity, and doping with cationic or anionic dopants to form more open channels and active sites for Li ion transport. This review is devoted to the recent progress in enhancing the LIBs performance of TiO2with various synthetic strategies and architectures control. Based on the lithium storage mechanism, we will also bring forward the existing challenges for future exploitation and development of TiO2-based anodes in energy storage, which would guide the development for rationally and efficiently designing more efficient TiO2-based LIBs anodes.

Engineering flexible carbon nanofibers concatenated MOFs-derived hollow octahedral CoFe2O4 as anode materials for enhanced lithium storage

2021 ◽  
Author(s):  
Fangfang Xue ◽  
Yangyang Li ◽  
Chen Liu ◽  
Zhigang Zhang ◽  
Jun Lin ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Anode Materials ◽  
Electrode Materials ◽  
Electronic Devices ◽  
High Capacity ◽  
Lithium Ion ◽  
Lithium Storage ◽  
Excellent Mechanical Property ◽  
Wearable Electronic ◽  
Wearable Electronic Devices

Constructing suitable electrode materials with high capacity and excellent mechanical property is indispensable for flexible lithium-ion batteries (LIBs) to satisfy the growing flexible and wearable electronic devices. Herein, a necklace-like...

Constructing zigzag-like hollow mesoporous nanospheres MoO2/C with superior lithium storage performance

2021 ◽  
Author(s):  
Wencai Zhao ◽  
Y.F. Yuan ◽  
S.M. Yin ◽  
Gaoshen Cai ◽  
S.Y. Guo
Keyword(s):  
Reaction Kinetics ◽  
Discharge Capacity ◽  
Amorphous Carbon ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Structure Design ◽  
Structure Stability ◽  
Lithium Storage

Abstract Hollow mesoporous nanospheres MoO2/C are successfully constructed through metal chelating reaction between molybdenum acetylacetone and glycerol as well as the Kirkendall effect induced by diammonium hydrogen phosphate. MoO2 nanoparticles coupled by amorphous carbon are assembled to unique zigzag-like hollow mesoporous nanosphere with large specific surface area of 147.7 m2 g-1 and main pore size of 8.7 nm. The content of carbon is 9.1%. As anode material for lithium-ion batteries, the composite shows high specific capacity and excellent cycling performance. At 0.2 A g-1, average discharge capacity stabilizes at 1092 mAh g-1. At 1 A g-1 after 700 cycles, the discharge capacity still reaches 512 mAh g-1. Impressively, the composite preserves intact after 700 cycles. Even at 5 A g-1, the discharge capacity can reach 321 mAh g-1, exhibiting superior rate capability. Various kinetics analyses demonstrate that in electrochemical reaction, the proportion of the surface capacitive effect is higher, and the composite has relatively high diffusion coefficient of Li ions and fast faradic reaction kinetics. Excellent lithium storge performance is attributed to the synergistic effect of zigzag-like hollow mesoporous nanosphere and amorphous carbon, which improves reaction kinetics, structure stability and electronic conductivity of MoO2. The present work provides a new useful structure design strategy for advanced energy storage application of MoO2.

scholarly journals Integrated Anode Electrode Composited Cu–Sn Alloy and Separator for Microscale Lithium Ion Batteries

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 603 ◽  
Author(s):  
Yuxia Liu ◽  
Kai Jiang ◽  
Shuting Yang
Keyword(s):  
Current Density ◽  
Active Material ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Electrode Structure ◽  
Microelectronic Devices ◽  
Anode Electrode ◽  
Integrated Anode ◽  
A Current

A novel integrated electrode structure was designed and synthesized by direct electrodepositing of Cu–Sn alloy anode materials on the Celgard 2400 separator (Cel-CS electrode). The integrated structure of the Cel-CS electrode not only greatly simplifies the battery fabrication process and increases the energy density of the whole electrode, but also buffers the mechanical stress caused by volume expansion of Cu–Sn alloy active material; thus, effectively preventing active material falling off from the substrate and improving the cycle stability of the electrode. The Cel-CS electrode exhibits excellent cycle performance and superior rate performance. A capacity of 728 mA·h·g−1 can be achieved after 250 cycles at the current density of 100 mA·g−1. Even cycled at a current density of 5 A·g−1 for 650 cycles, the Cel-CS electrode maintained a specific capacity of 938 mA·h·g−1, which illustrates the potential application prospects of the Cel-CS electrode in microelectronic devices and systems.

scholarly journals Surface Modifications of Positive-Electrode Materials for Lithium Ion Batteries

2019 ◽  
Vol 73 (11) ◽  
pp. 880-893 ◽  
Author(s):  
Nam Hee Kwon ◽  
Joanna Conder ◽  
Mohammed Srout ◽  
Katharina M. Fromm
Keyword(s):  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Surface Modifications ◽  
Positive Electrode ◽  
Layered Oxides ◽  
Spinel Type ◽  
Surface Modified ◽  
Positive Electrode Materials

Lithium ion batteries are typically based on one of three positive-electrode materials, namely layered oxides, olivine- and spinel-type materials. The structure of any of them is 'resistant' to electrochemical cycling, and thus, often requires modification/post-treatment to improve a certain property, for example, structural stability, ionic and/or electronic conductivity. This review provides an overview of different examples of coatings and surface modifications used for the positive-electrode materials as well as various characterization techniques often chosen to confirm/detect the introduced changes. It also assesses the electrochemical success of the surface-modified positive-electrode materials, thereby highlighting remaining challenges and pitfalls.

scholarly journals Atomistic Modeling of Various Doped Mg2NiH4 as Conversion Electrode Materials for Lithium Storage

Crystals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 254 ◽  
Author(s):  
Zhao Qian ◽  
Guanzhong Jiang ◽  
Yingying Ren ◽  
Xi Nie ◽  
Rajeev Ahuja
Keyword(s):  
Density Functional ◽  
Electrode Materials ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Density Functional Theory Calculations ◽  
Lithium Storage ◽  
Pure Material ◽  
Computational Screening ◽  
Electrochemical Capacity ◽  
Ti Doping

In this work, we have compared the potential applications of nine different elements doped Mg2NiH4 as conversion-type electrode materials in Li-ion batteries by means of state-of-the-art Density functional theory calculations. The electrochemical properties, such as specific capacity, volume change and average voltage, as well as the atomic and electronic structures of different doped systems have been investigated. The Na doping can improve the electrochemical capacity of the pristine material. Si and Ti doping can reduce the band gap and benefit the electronic conductivity of electrode materials. All of the nine doping elements can help to reduce the average voltage of negative electrodes and lead to reasonable volume changes. According to the computational screening, the Na, Si and Ti doping elements are thought to be promising to enhance the comprehensive properties of pure material. This theoretical study is proposed to encourage and expedite the development of metal-hydrides based lithium-storage materials.

scholarly journals Electrode Materials for High-Performance Sodium-Ion Batteries

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1952 ◽  
Author(s):  
Santanu Mukherjee ◽  
Shakir Bin Mujib ◽  
Davi Soares ◽  
Gurpreet Singh
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Electrode Materials ◽  
State Of The Art ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Cycle Life ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Grid Storage

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.

Facile synthesis of one-dimensional LiNi0.8Co0.15Al0.05O2 microrods as advanced cathode materials for lithium ion batteries

2015 ◽  
Vol 3 (26) ◽  
pp. 13648-13652 ◽  
Author(s):  
Naiteng Wu ◽  
Hao Wu ◽  
Wei Yuan ◽  
Shengjie Liu ◽  
Jinyu Liao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Structural Stability ◽  
Cathode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Facile Synthesis ◽  
Lithium Storage ◽  
One Dimensional

One-dimensional LiNi0.8Co0.15Al0.05O2 microrods are synthesized through chemical lithiation of mixed Ni, Co, and Al oxalate microrod. The rod-like morphology together with structural stability endows it with superior rate capability and cycle performance for highly reversible lithium storage.

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