scholarly journals Organic-phase synthesis of Li3V2(PO4)3@Carbon nanocrystals and their lithium storage properties

RSC Advances ◽  
2018 ◽  
Vol 8 (34) ◽  
pp. 19335-19340 ◽  
Author(s):  
Cunliang Zhang ◽  
Yanmei Liu ◽  
Jian Li ◽  
Kai Zhu ◽  
Zhe Chen ◽  
...  
Keyword(s):  
Organic Phase ◽  
Diffusion Length ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Lithium Storage ◽  
Phase Synthesis ◽  
Enhanced Surface ◽  
Lithium Ion Diffusion ◽  
Storage Properties

Li3V2(PO4)3@Carbon nanocrystals exhibit superior lithium storage properties due to the shortened lithium-ion diffusion length and the enhanced surface electronic conductivity.

Lithium storage properties of in situ synthesized Li2FeSiO4 and LiFeBO3 nanocomposites as advanced cathode materials for lithium ion batteries

2015 ◽  
Vol 3 (46) ◽  
pp. 23368-23375 ◽  
Author(s):  
Lin Hu ◽  
Jinlong Yang ◽  
Ibrahim Saana Amiinu ◽  
Xiaochun Kang ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Lithium Storage ◽  
Discharge Performance ◽  
Lithium Ion Diffusion ◽  
Storage Properties ◽  
Charge Discharge

The kinetics towards charge transfer and lithium ion diffusion are effectively enhanced with in situ adding small amounts of LiFeBO3, leading to a remarkably improved charge–discharge performance of Li2FeSiO4 as advanced cathode materials for lithium ion batteries.

The Effect of Sintering Temperature on Electronic Conductivity of LiFeGdPO4/C as a Lithium-Ion Battery Cathode

2021 ◽  
Vol 1028 ◽  
pp. 138-143
Author(s):  
Iman Rahayu ◽  
Anggi Suprabawati ◽  
Vina M. Puspitasari ◽  
Sahrul Hidayat ◽  
Atiek Rostika Noviyanti
Keyword(s):  
Lithium Ion Battery ◽  
Reduction Method ◽  
Sintering Temperature ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Particle Growth ◽  
Ion Diffusion ◽  
A Value ◽  
High Theoretical Capacity ◽  
Lithium Ion Diffusion

Lithium ion batteries with LiFePO4 cathode have become the focus of research because they are eco-friendly, stable, high average voltage (3.5 V), and high theoretical capacity (170 mAh/g). However, LiFePO4 has disadvantages such as low electrical conductivity (~10-9 S/cm) and low lithium ion diffusion coefficient (~10-14-10-15 cm2/s) that can inhibit its application as a lithium ion battery cathode material. To increase the electronic conductivity of LiFePO4, it can be done by adding carbon as a coating material, then doping gadolinium metal ions because it has a radius similar to Fe, and increasing sintering temperature. Optimizing the sintering temperature can control particle growth and research was study the sintering temperature of the electronic conductivity of LiFeGdPO4/C and obtain the optimum sintering temperature at LiFeGdPO4/C. The carbothermal reduction method used in synthesis, with a variation of sintering temperature of 800°C, 830°C, 850°C, 870°C, and 900°C using reagents LiH2PO4, Fe2O3, Gd2O3, and carbon black. Furthermore the samples were characterized using XRD, SEM-EDS, and four-point probes. The results of the study were expected to increase the conductivity of LiFePO4. The results show the effect of sintering temperature can increase the electronic conductivity of LiFeGdPO4/C. Samples with a sintering temperature 850°C have the highest conductivity among all temperature variations with a value of 1.11 × 10-5 S cm-1.

Selenium vacancy-rich and carbon-free VSe2 nanosheets for high-performance lithium storage

Nanoscale ◽  
2020 ◽  
Vol 12 (16) ◽  
pp. 8858-8866
Author(s):  
Qiwang Jiang ◽  
Jie Wang ◽  
Yan Jiang ◽  
Long Li ◽  
Xingzhong Cao ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Diffusion Rate ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Lithium Storage ◽  
Storage Performance ◽  
Lithium Ion Diffusion

Selenium vacancy-rich and carbon-free VSe2 nanosheets achieve excellent lithium storage performance due to significantly enhanced lithium-ion diffusion rate and electrochemical active sites induced by the Se vacancies.

scholarly journals Selective Phosphorization Boosting High-Performance NiO/Ni2Co4P3 Microspheres as Anode Materials for Lithium Ion Batteries

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 24
Author(s):  
Ji Yan ◽  
Xin-Bo Chang ◽  
Xiao-Kai Ma ◽  
Heng Wang ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Lithium Storage ◽  
Ion Storage ◽  
Storage Behavior ◽  
Storage Properties

Phosphorization of metal oxides/hydoxides to promote electronic conductivity as a promising strategy has attracted enormous attention for improving the electrochemical properties of anode material in lithium ion batteries. For this article, selective phosphorization from NiCo2O4 to NiO/Ni2Co4P3 microspheres was realized as an efficient route to enhance the electrochemical lithium storage properties of bimetal Ni-Co based anode materials. The results show that varying phosphorizaed reagent amount can significantly affect the transformation of crystalline structure from NiCo2O4 to intermediate NiO, hybrid NiO/Ni2Co4P3, and, finally, to Ni2Co4P3, during which alterated sphere morphology, shifted surface valance, and enhanced lithium-ion storage behavior are detected. The optimized phosphorization with 1:3 reagent mass ratio can maintain the spherical architecture, hold hybrid crystal structure, and improve the reversibly electrochemical lithium-ion storage properties. A specific capacity of 415 mAh g−1 is achieved at 100 mA g−1 specific current and maintains at 106 mAh g−1 when the specific current increases to 5000 mA g−1. Even after 200 cycles at 500 mA g−1, the optimized electrode still delivers 224 mAh g−1 of specific capacity, exhibiting desirable cycling stability. We believe that understanding of such selective phosphorization can further evoke a particular research enthusiasm for anode materials in lithium ion battery with high performances.

STRAIN INDUCED ENHANCED MIGRATION OF POLARON AND LITHIUM ION IN λ-MnO2

2012 ◽  
Vol 05 (04) ◽  
pp. 1250037 ◽  
Author(s):  
HUI-JUN YAN ◽  
ZHI-QIANG WANG ◽  
BO XU ◽  
CHUYING OUYANG
Keyword(s):  
Electrical Conductivity ◽  
Diffusion Coefficient ◽  
Dynamic Properties ◽  
Dynamic Performance ◽  
Compressive Strain ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Lithium Storage ◽  
Industrial Preparation ◽  
Lithium Ion Diffusion

The dynamic properties of λ- MnO2 under strain can be different to normal conditions as lithium storage material. Results from first-principles calculations show that compressive strain will enhance the electrical conductivity and lithium ion diffusion coefficient simultaneously. We show that 7% compressive strain applied along the (011) direction leads to about two orders of magnitude increase in both the electrical conductivity and Li diffusion coefficient under room temperature. 7% compressive strain applied along the (111) direction will increase the Li diffusion coefficient by five orders of magnitude. These results are important to experimental and industrial preparation and design of λ- MnO2 materials when interfaces are involved. The physical mechanism behind the strain induced improvement of the dynamic performance is discussed.

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.

scholarly journals Construction of 1D conductive Ni-MOF nanorods with fast Li+ kinetic diffusion and stable high-rate capacities as an anode for lithium ion batteries

2019 ◽  
Vol 1 (12) ◽  
pp. 4688-4691 ◽  
Author(s):  
Lingzhi Guo ◽  
Jinfeng Sun ◽  
Xuan Sun ◽  
Jinyang Zhang ◽  
Linrui Hou ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
High Rate ◽  
Charge Storage ◽  
Lithium Storage ◽  
Storage Mechanism ◽  
Charge Storage Mechanism ◽  
Kinetic Diffusion ◽  
Storage Properties

1D conductive Ni-CAT nanorods with a superb Li+ diffusion coefficient and electronic conductivity exhibited remarkable electrochemical lithium storage properties, and the charge-storage mechanism involved was rationally put forward.

Synthesis and high cycle performance of Li2ZnTi3O8/C anode material promoted by asphalt as a carbon precursor

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 49298-49306 ◽  
Author(s):  
Yurong Ren ◽  
Peng Lu ◽  
Xiaobing Huang ◽  
Jianning Ding ◽  
Haiyan Wang
Keyword(s):  
Anode Material ◽  
Electronic Conductivity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Carbon Layer ◽  
Cycle Performance ◽  
Carbon Precursor ◽  
Ion Diffusion ◽  
Lithium Ion Diffusion

A carbon layer (ca. 3 nm) formed on the surface of Li2ZnTi3O8 nanoparticles (ca. 30 nm) which is favorable to improve the electronic conductivity and lithium ion diffusion, resulting in improved rate capability and cycling performance.

scholarly journals Fast 3D-lithium-ion diffusion and high electronic conductivity of Li2MnSiO4 surfaces for rechargeable lithium-ion batteries

RSC Advances ◽  
2021 ◽  
Vol 11 (16) ◽  
pp. 9721-9730
Author(s):  
Gamachis Sakata Gurmesa ◽  
Natei Ermias Benti ◽  
Mesfin Diro Chaka ◽  
Girum Ayalneh Tiruye ◽  
Qinfang Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Low Cost ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
High Electronic Conductivity ◽  
Lithium Ion Diffusion ◽  
The Way

The DFT analysis revealed fast 3D-lithium-ion diffusion pathways and high electronic conductivity in the Li2MnSiO4 surface, and thus paving the way for designing and developing efficient and low-cost rechargeable lithium-ion batteries.

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