scholarly journals The Ultrafast Laser Ablation of Li(Ni0.6Mn0.2Co0.2)O2 Electrodes with High Mass Loading

2019 ◽  
Vol 9 (19) ◽  
pp. 4067 ◽  
Author(s):  
Penghui Zhu ◽  
Hans Jürgen Seifert ◽  
Wilhelm Pfleging
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Thick Film ◽  
Power Density ◽  
Discharge Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Ultrafast Laser ◽  
High Mass ◽  
Simultaneous Increase

Lithium-ion batteries have become the most promising energy storage devices in recent years. However, the simultaneous increase of energy density and power density is still a huge challenge. Ultrafast laser structuring of electrodes is feasible to increase power density of lithium-ion batteries by improving the lithium-ion diffusion kinetics. The influences of laser processing pattern and film thickness on the rate capability and energy density were investigated using Li(Ni0.6Mn0.2Co0.2)O2 (NMC 622) as cathode material. NMC 622 electrodes with thicknesses from 91 µm to 250 µm were prepared, while line patterns with pitch distances varying from 200 µm to 600 µm were applied. The NMC 622 cathodes were assembled opposing lithium using coin cell design. Cells with structured, 91 µm thick film cathodes showed lesser capacity losses with C-rates 3C compared to cells with unstructured cathode. Cells with 250 µm thick film cathode showed higher discharge capacity with low C-rates of up to C/5, and the structured cathodes showed higher discharge capacity, with C-rates of up to 1C. However, the discharge capacity deteriorated with higher C-rate. An appropriate choice of laser generated patterns and electrode thickness depends on the requested battery application scenario; i.e., charge/discharge rate and specific/volumetric energy density.

Excellent rate capability and cycling stability in Li+-conductive Li2SnO3-coated LiNi0.5Mn1.5O4 cathode materials for lithium-ion batteries

2018 ◽  
Vol 47 (20) ◽  
pp. 7020-7028 ◽  
Author(s):  
Jirong Mou ◽  
Yunlong Deng ◽  
Zhicui Song ◽  
Qiaoji Zheng ◽  
Kwok Ho Lam ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Power Density ◽  
High Voltage ◽  
Cathode Materials ◽  
Active Material ◽  
Rate Capability ◽  
Lithium Ion ◽  
Side Reactions ◽  
Capacity Fading

High-voltage LiNi0.5Mn1.5O4 is a promising cathode candidate for lithium-ion batteries (LIBs) due to its considerable energy density and power density, but the material generally undergoes serious capacity fading caused by side reactions between the active material and organic electrolyte.

Nanoporous Carbon Sponge as the Anode Materials for Lithium Ion Batteries

2012 ◽  
Vol 15 (4) ◽  
pp. 233-236
Author(s):  
Lianna Dang ◽  
Qina Sa ◽  
Zhangfeng Zheng ◽  
Yan Wang ◽  
Shenqiang Ren
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Power Density ◽  
Anode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Energy ◽  
Nanoporous Carbon ◽  
High Energy Density ◽  
Long Cycle Life

Lithium ion battery is the choice for future generations of portable electronics and hybrid and electric vehicles due to its high energy density, power density and long cycle life compared to other battery technologies. However, current graphite anode limits its application due to the low energy density derived from layered graphitic structure and low rate capability due to the slow diffusion of Li ion in graphite. In this study, a simple and versatile approach was developed to generate nanoporous carbon sponge using the combination of hard templating and etching reaction. The electrochemical properties have been tested with these novel anode materials, which showed remarkable electrochemical performance and cycling stability. Therefore, the nanoporous carbon sponge is promising to be used as the anode materials for next generation lithium ion batteries requiring high energy density and power density.

scholarly journals Enhanced Roles of Carbon Architectures in High-Performance Lithium-Ion Batteries

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Lu Wang ◽  
Junwei Han ◽  
Debin Kong ◽  
Ying Tao ◽  
Quan-Hong Yang
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
High Mass

Abstract Lithium-ion batteries (LIBs), which are high-energy-density and low-safety-risk secondary batteries, are underpinned to the rise in electrochemical energy storage devices that satisfy the urgent demands of the global energy storage market. With the aim of achieving high energy density and fast-charging performance, the exploitation of simple and low-cost approaches for the production of high capacity, high density, high mass loading, and kinetically ion-accessible electrodes that maximize charge storage and transport in LIBs, is a critical need. Toward the construction of high-performance electrodes, carbons are promisingly used in the enhanced roles of active materials, electrochemical reaction frameworks for high-capacity noncarbons, and lightweight current collectors. Here, we review recent advances in the carbon engineering of electrodes for excellent electrochemical performance and structural stability, which is enabled by assembled carbon architectures that guarantee sufficient charge delivery and volume fluctuation buffering inside the electrode during cycling. Some specific feasible assembly methods, synergism between structural design components of carbon assemblies, and electrochemical performance enhancement are highlighted. The precise design of carbon cages by the assembly of graphene units is potentially useful for the controlled preparation of high-capacity carbon-caged noncarbon anodes with volumetric capacities over 2100 mAh cm−3. Finally, insights are given on the prospects and challenges for designing carbon architectures for practical LIBs that simultaneously provide high energy densities (both gravimetric and volumetric) and high rate performance.

scholarly journals New dry carbon nanotube coating of over-lithiated layered oxide cathode for lithium ion batteries

2014 ◽  
Vol 2 (46) ◽  
pp. 19670-19677 ◽  
Author(s):  
Junyoung Mun ◽  
Jin-Hwan Park ◽  
Wonchang Choi ◽  
Anass Benayad ◽  
Jun-Ho Park ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Energy Density ◽  
Lithium Ion Batteries ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Multiwall Carbon Nanotube ◽  
High Rate Capability ◽  
Oxide Cathode ◽  
Multiwall Carbon

For high rate capability and energy density of lithium ion batteries, over-lithiated layered cathodes coated by multiwall carbon nanotube were prepared by a novel dry method without decay in the structure.

Solvothermal Synthsis of Nano-Sized Li4Ti5O12 Particles as Anode Material for Lithium Ion Batteries

2015 ◽  
Vol 1120-1121 ◽  
pp. 281-285 ◽  
Author(s):  
Yue Zhang ◽  
Yu Jing Zhu ◽  
Yuan Xiang Gu ◽  
Rui Xin Chen
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Discharge Capacity ◽  
Solvothermal Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Electrochemical Measurements ◽  
Initial Discharge Capacity ◽  
Initial Discharge

We synthesized nano-Li4Ti5O12 particles by solvothermal method. The as-prepared materials were characterized by XRD, SEM, TEM and electrochemical measurements. The Li4Ti5O12Li4Ti5O12 showed excellent rate capability and cycle ability. The as-preparedLi4Ti5O12 Li4Ti5O12 electrode exhibited highly initial discharge capacity 176 mAh/g at 0.1 C rate up to, which was slightly higher than its theoretical capacity (175 mAh/g). By increasing the C-rate, the cell showed 152, 143, 138 and 135 mAh/g at 0.5, 1, 1.5 and 2 C, respectively.

Structure and electrochemical properties of Sm-doped Li4Ti5O12 as anode material for lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15492-15500 ◽  
Author(s):  
Zhanyu Li ◽  
Jianling Li ◽  
Yuguang Zhao ◽  
Kai Yang ◽  
Fei Gao ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Discharge Capacity ◽  
Anode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Performance

Sm doping has a great impact on discharge capacity, rate capability and cycling performance of LTO anode materials for lithium-ion batteries.

Mg doped Li2FeSiO4/C nanocomposites synthesized by the solvothermal method for lithium ion batteries

2017 ◽  
Vol 46 (38) ◽  
pp. 12908-12915 ◽  
Author(s):  
Ajay Kumar ◽  
O. D. Jayakumar ◽  
Jagannath Jagannath ◽  
Parisa Bashiri ◽  
G. A. Nazri ◽  
...  
Keyword(s):  
Carbon Content ◽  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Solvothermal Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Initial Discharge Capacity ◽  
Cycle Stability ◽  
Initial Discharge ◽  
Mg Doped

Despite having the same carbon content, Li2Fe0.99Mg0.01SiO4/C delivered the highest initial discharge capacity and also exhibited the best rate capability and cycle stability.

Three-dimensionally ordered porous TiNb2O7 nanotubes: a superior anode material for next generation hybrid supercapacitors

2015 ◽  
Vol 3 (32) ◽  
pp. 16785-16790 ◽  
Author(s):  
Hongsen Li ◽  
Laifa Shen ◽  
Jie Wang ◽  
Shan Fang ◽  
Yingxia Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Power Density ◽  
Anode Material ◽  
Lithium Ion ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Cycling Performances ◽  
Ordered Porous ◽  
Generation Hybrid

A novel hybrid supercapacitor is successfully constructed based on the 3D ordered porous TiNb2O7 electrode (anode) and graphene grass electrode (cathode). In combination with the advantages from the lithium ion batteries and supercapacitors, this device shows superior energy density and power density with improved cycling performances.

On-chip high power porous silicon lithium ion batteries with stable capacity over 10 000 cycles

Nanoscale ◽  
2015 ◽  
Vol 7 (1) ◽  
pp. 98-103 ◽  
Author(s):  
Andrew S. Westover ◽  
Daniel Freudiger ◽  
Zarif S. Gani ◽  
Keith Share ◽  
Landon Oakes ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Energy Density ◽  
Lithium Ion Batteries ◽  
Power Density ◽  
High Power ◽  
Lithium Battery ◽  
Lithium Ion ◽  
High Rate ◽  
On Chip ◽  
Battery Anode

We demonstrate the operation of a graphene-passivated on-chip porous silicon material as a high rate lithium battery anode with over 50X power density, and 100X energy density improvement compared to identically prepared on-chip supercapacitors.

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