scholarly journals Structure and electrochemical performance modulation of a LiNi0.8Co0.1Mn0.1O2 cathode material by anion and cation co-doping for lithium ion batteries

RSC Advances ◽  
2019 ◽  
Vol 9 (63) ◽  
pp. 36849-36857 ◽  
Author(s):  
Rong Li ◽  
Yong Ming ◽  
Wei Xiang ◽  
Chunliu Xu ◽  
Guilin Feng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Energy Density ◽  
Electrochemical Performance ◽  
Transition Metal Oxides ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Practical Application ◽  
Co Doping ◽  
Layered Transition Metal ◽  
Great Energy

Ni-rich layered transition metal oxides show great energy density but suffer poor thermal stability and inferior cycling performance, which limit their practical application.

Tailoring the morphology followed by the electrochemical performance of NiMn-LDH nanosheet arrays through controlled Co-doping for high-energy and power asymmetric supercapacitors

2017 ◽  
Vol 46 (38) ◽  
pp. 12876-12883 ◽  
Author(s):  
Saurabh Singh ◽  
Nanasaheb M. Shinde ◽  
Qi Xun Xia ◽  
Chandu V. V. M. Gopi ◽  
Je Moon Yun ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Power Density ◽  
High Energy ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Co Doping ◽  
Nanosheet Arrays

A NiCoMn-LDH (10%)//rGO asymmetric supercapacitor device with 574 Wh kg−1 energy density at 749.9 W kg−1 power density and 89.4% retention even after 2500 cycles has been explored.

Tailoring atomic distribution in micron-sized and spherical Li-rich layered oxides as cathode materials for advanced lithium-ion batteries

2016 ◽  
Vol 4 (20) ◽  
pp. 7689-7699 ◽  
Author(s):  
Peiyu Hou ◽  
Guoran Li ◽  
Xueping Gao
Keyword(s):  
Thermal Stability ◽  
Energy Density ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Concentration Gradient ◽  
Lithium Ion ◽  
Cycle Life ◽  
Layered Oxides ◽  
Long Cycle ◽  
Long Cycle Life

A concentration-gradient doping strategy is introduced into micron-sized spherical Li-rich layered oxides. As a result, they exhibit high volumetric energy density, long cycle life and enhanced thermal stability.

scholarly journals LiCoO2/Graphite Cells with Localized High Concentration Carbonate Electrolytes for Higher Energy Density

Liquids ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 60-74
Author(s):  
Xin Ma ◽  
Peng Zhang ◽  
Huajun Zhao ◽  
Qingrong Wang ◽  
Guangzhao Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
High Voltage ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Porous Electrodes ◽  
Dramatic Improvement ◽  
Effective Strategy ◽  
High Concentration ◽  
Mixed Carbonate

Widening the working voltage of lithium-ion batteries is considered as an effective strategy to improve their energy density. However, the decomposition of conventional aprotic electrolytes at high voltage greatly impedes the success until the presence of high concentration electrolytes (HCEs) and the resultant localized HCEs (LHCEs). The unique solvated structure of HCEs/LHCEs endows the involved solvent with enhanced endurance toward high voltage while the LHCEs can simultaneously possess the decent viscosity for sufficient wettability to porous electrodes and separator. Nowadays, most LHCEs use LiFSI/LiTFSI as the salts and β-hydrofluoroethers as the counter solvents due to their good compatibility, yet the LHCE formula of cheap LiPF6 and high antioxidant α-hydrofluoroethers is seldom investigated. Here, we report a unique formula with 3 mol L−1 LiPF6 in mixed carbonate solvents and a counter solvent α-substituted fluorine compound (1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropylether). Compared to a conventional electrolyte, this formula enables dramatic improvement in the cycling performance of LiCoO2//graphite cells from approximately 150 cycles to 1000 cycles within the range of 2.9 to 4.5 V at 0.5 C. This work provides a new choice and scope to design functional LHCEs for high voltage systems.

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.

Synthesis of cobalt-doped V2O3 with a hierarchical yolk–shell structure for high-performance lithium-ion batteries

CrystEngComm ◽  
2020 ◽  
Vol 22 (10) ◽  
pp. 1705-1711 ◽  
Author(s):  
Shuai Zhang ◽  
Li Zhang ◽  
Guancheng Xu ◽  
Xiuli Zhang ◽  
Aihua Zhao
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Shell Structure ◽  
High Performance ◽  
Lithium Ion ◽  
The Novel ◽  
Co Doping ◽  
Solvothermal Treatment ◽  
Subsequent Calcination

Co-V2O3-24 yolk–shell nanospheres were synthesized via a solvothermal treatment and subsequent calcination. The electrochemical performance of Co-V2O3-24 is greatly improved because of Co-doping and the novel hierarchical yolk–shell structure.

[email protected] as high-voltage lithium-ion battery cathode materials with improved cycling performance and thermal stability

2019 ◽  
Vol 327 ◽  
pp. 135018 ◽  
Author(s):  
Peipei Pang ◽  
Zheng Wang ◽  
Xinxin Tan ◽  
Yaoming Deng ◽  
Junmin Nan ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Lithium Ion Battery ◽  
High Voltage ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Cycling Performance

Improvement of the Cycling Performance and Thermal Stability of Lithium-Ion Batteries by Coating Cathode Materials with Al2O3Nano Layer

2017 ◽  
Vol 164 (2) ◽  
pp. A475-A481 ◽  
Author(s):  
Zhaoxia Cao ◽  
Yanlei Li ◽  
Mengjiao Shi ◽  
Guangshuang Zhu ◽  
Ruirui Zhang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Thermal Stability Of

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 Tailoring the Charge/Discharge Potentials and Electrochemical Performance of SnO 2 Lithium‐Ion Anodes by Transition Metal Co‐Doping

2020 ◽  
Vol 3 (3) ◽  
pp. 284-292 ◽  
Author(s):  
Adele Birrozzi ◽  
Jakob Asenbauer ◽  
Thomas E. Ashton ◽  
Alexandra R. Groves ◽  
Dorin Geiger ◽  
...  
Keyword(s):  
Transition Metal ◽  
Electrochemical Performance ◽  
Lithium Ion ◽  
Co Doping ◽  
Charge Discharge
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