scholarly journals Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1946 ◽  
Author(s):  
Hae-Jun Kwon ◽  
Sang-Wook Woo ◽  
Yong-Ju Lee ◽  
Je-Young Kim ◽  
Sung-Man Lee
Keyword(s):  
High Performance ◽  
Carbon Coating ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Rate Performance ◽  
Natural Graphite ◽  
Artificial Graphite ◽  
Ag Electrodes ◽  
Natural Graphite Anode

The electrochemical performance of modified natural graphite (MNG) and artificial graphite (AG) was investigated as a function of electrode density ranging from 1.55 to 1.7 g∙cm−3. The best performance was obtained at 1.55 g∙cm−3 and 1.60 g∙cm−3 for the AG and MNG electrodes, respectively. Both AG, at a density of 1.55 g∙cm−3, and MNG, at a density of 1.60 g∙cm−3, showed quite similar performance with regard to cycling stability and coulombic efficiency during cycling at 30 and 45 °C, while the MNG electrodes at a density of 1.60 g∙cm−3 and 1.7 g∙cm−3 showed better rate performance than the AG electrodes at a density of 1.55 g∙cm−3. The superior rate capability of MNG electrodes can be explained by the following effects: first, their spherical morphology and higher electrode density led to enhanced electrical conductivity. Second, for the MNG sample, favorable electrode tortuosity was retained and thus Li+ transport in the electrode pore was not significantly affected, even at high electrode densities of 1.60 g∙cm−3 and 1.7 g∙cm−3. MNG electrodes also exhibited a similar electrochemical swelling behavior to the AG electrodes.

SiO2@NiO core–shell nanocomposites as high performance anode materials for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (77) ◽  
pp. 63012-63016 ◽  
Author(s):  
Yourong Wang ◽  
Wei Zhou ◽  
Liping Zhang ◽  
Guangsen Song ◽  
Siqing Cheng
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Core Shell ◽  
Excellent Cycling Stability

A SiO2@NiO core–shell electrode exhibits almost 100% coulombic efficiency, excellent cycling stability and rate capability after the first few cycles.

Synthesis and Electrochemical Performance of SnO2/Graphene Hybrid Anode for Lithium Ion Batteries

2013 ◽  
Vol 1540 ◽  
Author(s):  
Chia-Yi Lin ◽  
Chien-Te Hsieh ◽  
Ruey-Shin Juang
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Homogeneous Distribution

ABSTRACTAn efficient microwave-assisted polyol (MP) approach is report to prepare SnO2/graphene hybrid as an anode material for lithium ion batteries. The key factor to this MP method is to start with uniform graphene oxide (GO) suspension, in which a large amount of surface oxygenate groups ensures homogeneous distribution of the SnO2 nanoparticles onto the GO sheets under the microwave irradiation. The period for the microwave heating only takes 10 min. The obtained SnO2/graphene hybrid anode possesses a reversible capacity of 967 mAh g-1 at 0.1 C and a high Coulombic efficiency of 80.5% at the first cycle. The cycling performance and the rate capability of the hybrid anode are enhanced in comparison with that of the bare graphene anode. This improvement of electrochemical performance can be attributed to the formation of a 3-dimensional framework. Accordingly, this study provides an economical MP route for the fabrication of SnO2/graphene hybrid as an anode material for high-performance Li-ion batteries.

A novel hierarchical precursor of densely integrated hydroxide nanoflakes on oxide microspheres toward high-performance layered Ni-rich cathode for lithium ion batteries

2018 ◽  
Vol 2 (10) ◽  
pp. 1822-1828 ◽  
Author(s):  
Yan Li ◽  
Xinhai Li ◽  
Zhixing Wang ◽  
Huajun Guo ◽  
Tao Li ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Tap Density ◽  
Excellent Cycling Stability ◽  
Initial Coulombic Efficiency

LiNi0.8Co0.1Mn0.1O2 cathode derived from a novel [email protected](OH)2 hierarchical precursor exhibits improved tap density and initial coulombic efficiency, as well as excellent cycling stability and superior rate capability.

Electrochemical Properties of Highly Ordered TiO2 Nanotube Arrays as an Anode Material for Lithium-Ion Batteries

2011 ◽  
Vol 130-134 ◽  
pp. 1281-1285 ◽  
Author(s):  
Li Li Wang ◽  
Shi Chao Zhang ◽  
Xiao Meng Wu
Keyword(s):  
Electrochemical Properties ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Nanotube Arrays ◽  
Rate Performance ◽  
Treatment Rate ◽  
High Rate Capability ◽  
Nanotube Array

Well-aligned TiO2 nanotube arrays were fabricated from anodization by a subsequent heat treatment. Rate performance and electrochemical properties of TiO2 nanotube arrays were studied intensively. The electrode exhibits excellent rate capabilities at various rates with an average coulombic efficiency reaching 95.6%. It is obvious that TiO2 nanotube array possesses high rate capability and excellent cycling stability.

scholarly journals A Poriferous Nanoflake-Assembled Flower-Like Ni5P4 Anode for High-Performance Sodium-Ion Batteries

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Ruihan Zhang ◽  
Vidhur Raveendran ◽  
Yining He ◽  
Andy Yau ◽  
Austin Chang ◽  
...  
Keyword(s):  
High Performance ◽  
Coulombic Efficiency ◽  
High Surface ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Sodium Ion ◽  
Electrochemical Characteristics ◽  
Sodium Ion Batteries ◽  
Retention Capacity

Sodium-ion batteries (SIBs) have been regarded as one of the most competitive alternatives for lithium-ion batteries (LIBs) due to the abundance of sodium and comparable electrochemical characteristics of sodium to that of lithium. However, while highly desired, developing stable anode materials remains a critical challenge. In this work, the development of a stable anode for SIBs is reported, a poriferous nanoflake-assembled flower-like nickel tetraphosphide (PNAF-NP) with high surface area and typical mesoporous property. Due to the unique structure, the PANF-NP anode exhibits excellent reversible capacity of 648.34 mAh g-1 at 0.2 A g-1 with a Coulombic efficiency of 98.67%, and superior cycling stability at 0.2 A g-1 with high retention capacity of 456.34 mAh g-1 and average Coulombic efficiency of 99.19% after 300 cycles. Moreover, the high reversible capacity of 614.43, 589.49, 512.66, and 432.23 mAh g-1 is achieved at 0.5, 1, 2, and 5 A g-1, respectively, indicating the superior rate capability of the PNAF-NP anode. This work represents a great advancement in the field of SIBs by reporting a high-performance anode material.

Effect of synthetic condition on the electrochemical behavior of MoO3 microplates used as anode in lithium-ion batteries

2018 ◽  
Vol 96 (3) ◽  
pp. 340-344
Author(s):  
Xia Zhang ◽  
Yan Li ◽  
Danqing Li ◽  
Yujun Zhang ◽  
Yuandong Xu
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Hydrothermal Reaction ◽  
Molybdenum Trioxide ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Potential Candidate ◽  
Lithium Storage

Molybdenum trioxide (MoO3) microplates are synthesized via the hydrothermal method and a simple heat treatment process without adding surfactant. Different hydrothermal reaction times and acidities are employed to explore the influence of preparation condition on the electrochemical performance for MoO3 microplates. These studies reveal that the hydrothermal time and acidity have a great impact on the morphology of MoO3 microplates. As anode materials for lithium-ion batteries (LIBs), the sheets-assembled MoO3 microplates with longer hydrothermal reaction time and proper acidity possess a superior morphology, which show better cycling performance and rate capability stability. The prepared MoO3 microplates display that the coulombic efficiency is around 100% during 50 cycles, demonstrating much better lithium storage properties. Considering the excellent electrochemical performance, the MoO3 microplates are considered to be a potential candidate in high-performance LIBs.

Spheroidization Modification of Artificial Graphite Applied as Anode Materials for High Rate Lithium Ion Batteries

2011 ◽  
Vol 201-203 ◽  
pp. 421-424 ◽  
Author(s):  
Yu Shiang Wu ◽  
Tzuo Shing Yeh ◽  
Yuan Haun Lee ◽  
Yu Chi Lee
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Natural Graphite ◽  
Lithium Ions ◽  
Artificial Graphite ◽  
Graphene Layers ◽  
Rate Region

Rate capability tests showed that artificial graphite after spheroidization treatment exhibited a higher capacity in the higher C-rate region (2~10C) at a 0.1 C rate charge and variable C-rates discharge. Artificial graphite after spheroidization treatment exhibited a higher capacity in the higher C-rate region (0.5~9 C) at the same C-rate charge and discharge. These results show that artificial graphite after spheroidization treatment has a large amount of isotropic microstructures that lithium ions can intercalate into the graphene layers from all directions via edge-plane surfaces. Therefore, the artificial graphite is more suitable than natural graphite for the anode materials of high rate batteries.

Lithium-rich Li1.2Ni0.13Co0.13Mn0.54O2 oxide coated by Li3PO4 and carbon nanocomposite layers as high performance cathode materials for lithium ion batteries

2015 ◽  
Vol 3 (6) ◽  
pp. 2634-2641 ◽  
Author(s):  
Hui Liu ◽  
Cheng Chen ◽  
Chunyu Du ◽  
Xiaoshu He ◽  
Geping Yin ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Initial Coulombic Efficiency ◽  
Carbon Nanocomposite

A lithium-rich Li1.2Ni0.13Co0.13Mn0.54O2 material coated by fast Li+ and electron conductors exhibits outstanding rate capability, cyclability and initial coulombic efficiency.

scholarly journals High power and stable P-doped yolk-shell structured Si@C anode simultaneously enhancing conductivity and Li+ diffusion kinetics

Nano Research ◽  
2020 ◽  
Author(s):  
Ming Chen ◽  
Qinnan Zhou ◽  
Jiantao Zai ◽  
Asma Iqbal ◽  
TsegayeTadesse Tsega ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Power Density ◽  
Rate Performance ◽  
Energy Storage Devices ◽  
Lithium Ion Capacitor

Abstract Silicon is a low price and high capacity anode material for lithium-ion batteries. The yolk-shell structure can effectively accommodate Si expansion to improve stability. However, the limited rate performance of Si anodes can’t meet people’s growing demand for high power density. Herein, the phosphorus-doped yolk-shell Si@C materials (P-doped Si@C) were prepared through carbon coating on P-doped Si/SiOx matrix to obtain high power and stable devices. Therefore, the as-prepared P-doped Si@C electrodes delivered a rapid increase in Coulombic efficiency from 74.4% to 99.6% after only 6 cycles, high capacity retention of ∼ 95% over 800 cycles at 4 A·g−1, and great rate capability (510 mAh·g−1 at 35 A·g−1). As a result, P-doped Si@C anodes paired with commercial activated carbon and LiFePO4 cathode to assemble lithium-ion capacitor (high power density of ∼ 61,080 W·kg−1 at 20 A·g−1) and lithium-ion full cell (good rate performance with 68.3 mAh·g−1 at 5 C), respectively. This work can provide an effective way to further improve power density and stability for energy storage devices.

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