Electrochemical Properties of SnO2 Thin Films Doped with Bi and Si for Negative Electrode of Microbattery

2001 ◽  
Vol 672 ◽  
Author(s):  
Young-Il Kim ◽  
Hee-Soo Moon ◽  
Kwang-Sun Ji ◽  
You-Kee Lee ◽  
Jong-Wan Park
Keyword(s):  
Negative Electrode ◽  
Reversible Capacity ◽  
Cycle Performance ◽  
Mixed Conductor ◽  
Capacity Retention ◽  
Promising Alternative ◽  
Capacity Loss ◽  
Micro Cracks ◽  
Formation Of Cracks ◽  
Sno2 Thin Films

ABSTRACTTin oxide has been proposed as a promising alternative anode material for microbatteries. It has been reported that its theoretical volumetric capacity is four times larger than that of carbon-based materials, while its gravimetric capacity is twice as large. In this experiment, optimal Si and Bi doped SnO2 films were prepared with e-beam evaporation to improve both the cycle performance and the reversible capacity. The films with addition of Si only exhibited reductions in aggregation of tin particles and formation of micro-cracks. However, there still remained cracks, which induce capacity loss during cycling. To improve capacity retention, Bi was added with Si to SnO2 films, which exhibited the highest reversible capacity of 200µAh/cm2-µm at 200th cycle. The films doped with Bi and Si were found to be ill-defined and featureless without noticeable particle aggregation and cracks. However, the films that underwent cycling tests showed again aggregated tin particles and formation of cracks, which would induce cell failure during cycling. We believe that some types of Li-Bi phases as mixed-conductor matrices have improved the cycle life.

A hierarchical micro/mesoporous carbon fiber/sulfur composite for high-performance lithium–sulfur batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 37443-37451 ◽  
Author(s):  
Zhijie Gong ◽  
Qixing Wu ◽  
Fang Wang ◽  
Xu Li ◽  
Xianping Fan ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
High Performance ◽  
Reversible Capacity ◽  
Cycle Performance ◽  
Hierarchical Porous Carbon ◽  
Capacity Retention ◽  
High Reversible Capacity ◽  
Hierarchical Porous ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

A hierarchical porous carbon fiber (HPCF) was prepared via electrospinning. The HPCF cathode delivers a high reversible capacity of 1070.6 mA h g−1 at 0.5C and a stable cycle performance with a capacity retention of 88.4% after 100 cycles.

Novel Co3O4/Carbon Nanofiber Composite Electrode with High Li-Storage Capacity for Lithium Ion Batteries

2011 ◽  
Vol 197-198 ◽  
pp. 1113-1116 ◽  
Author(s):  
Wen Li Yao ◽  
Jin Qing Chen ◽  
An Yun Li ◽  
Xin Bing Chen
Keyword(s):  
Composite Materials ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Storage Capacity ◽  
Carbon Nanofiber ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Li Storage

The platelike Co3O4/carbon nanofiber (CNF) composite materials were synthesized by the calcination of β-Co(OH)2/CNF precursor prepared by a surfactant-free hydrothermal method. As negative electrode materials for lithium-ion batteries, the platelike Co3O4/CNF composites can deliver a high reversible capacity of 900 mAh g-1 for a life extending over hundreds of cycles at a current density of 100 mA g-1. The high Li-storage capacity and excellent cycling performance for Co3O4/CNF composite materials may mainly attribute to the beneficial effect of the CNFs addition on enhancing structural stability and electrical conductivity of Co3O4 platelets.

Preparation and Electrochemical Performance of Praseodymium Doped SnO2 Particles as Negative Electrode Material of Lithium-Ion Battery

2014 ◽  
Vol 492 ◽  
pp. 370-374
Author(s):  
Xiao Zhen Liu ◽  
Guang Jian Lu ◽  
Xiao Zhou Liu ◽  
Jie Chen ◽  
Han Zhang Xiao
Keyword(s):  
Lithium Ion Battery ◽  
Electrode Material ◽  
Electrode Materials ◽  
Raw Materials ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Xrd Analysis ◽  
Coprecipitation Method ◽  
Negative Electrode Material

Pr doped SnO2 particles as negative electrode material of lithium-ion battery are synthesized by the coprecipitation method with SnCl4·5H2O and Pr2O3 as raw materials. The structure of the SnO2 particles and Pr doped SnO2 particles are investigated respectively by XRD analysis. Doping is achieved well by coprecipitation method and is recognized as replacement doping or caulking doping. Electrochemical properties of the SnO2 particles and Pr doped SnO2 particles are tested by charge-discharge and cycle voltammogram experimentation, respectively. The initial specific discharge capacity of Pr doped SnO2 the negative electrode materials is 676.3mAh/g. After 20 cycles, the capacity retention ratio is 90.5%. The reversible capacity of Pr doped SnO2 negative electrode material higher than the reversible capacity of SnO2 negative electrode material. Pr doped SnO2 particles has good lithiumion intercalation/deintercalation performance.

In situ sulfur deposition route to obtain sulfur–carbon composite cathodes for lithium–sulfur batteries

2014 ◽  
Vol 2 (12) ◽  
pp. 4316-4323 ◽  
Author(s):  
W. G. Wang ◽  
X. Wang ◽  
L. Y. Tian ◽  
Y. L. Wang ◽  
S. H. Ye
Keyword(s):  
Reversible Capacity ◽  
Carbon Composite ◽  
Cycle Performance ◽  
Carbon Composites ◽  
Stable Cycle ◽  
Sulfur Deposition ◽  
Composite Cathodes ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

Sulfur–carbon composites were prepared by an in situ sulfur deposition route developed for the heterogeneous nucleation of sulfur into nanopores of conductive carbon black (CCB) by fumigation of Na2S4/CCB powder with HCl. The sulfur–carbon composites demonstrate enhanced reversible capacity and stable cycle performance.

Single Crystalline V2O5 Nanowire/Graphene Composite as Cathode Material for Lithium-Ion Batteries

2013 ◽  
Vol 873 ◽  
pp. 575-580 ◽  
Author(s):  
Qing He ◽  
Dong Lin Zhao ◽  
Yang Yang Zhu ◽  
Jing Xing Zhang
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Graphene Nanosheets ◽  
Synthesis Method ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycle Performance ◽  
Single Crystalline ◽  
Electrochemical Testing ◽  
Transmission Electron

The single crystalline V2O5nanowire/graphene nanosheets (GNS) composite has been successfully prepared via an easy and facile one-step hydrothermal synthesis method. The morphology, structure and electrochemical performance of V2O5nanowire/GNS composite as cathode material for lithium-ion batteries were systematically investigated by transmission electron microscope, X-ray diffraction and a variety of electrochemical testing techniques. The V2O5single crystalline nanowires were supported on the GNS substrate and exhibited excellent electrochemical properties. When used as a cathode material of lithium-ion batteries, the composite material revealed high initial discharge capacities and exceptional rate capacities. It was found that V2O5nanowire/GNS composite exhibited a relatively high reversible capacity of 357 mA h g-1and fine cycle performance.

Electrochemical Behavior of LiCo(1-x)MnxO2 Crystalline Powders

2014 ◽  
Vol 895 ◽  
pp. 334-337
Author(s):  
Azira Azahidi ◽  
Norlida Kamarulzaman ◽  
Kelimah Elong ◽  
Nurhanna Badar ◽  
Nurul Atikah Mohd Mokhtar
Keyword(s):  
Partial Substitution ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Capacity Retention ◽  
X Ray ◽  
Capacity Loss ◽  
Transition Metal Element ◽  
Metal Element ◽  
Li Ion ◽  
Mn Doped

LiCoO2 is a well-known cathode material used in commercial Li-ion batteries but it has its own limitations in terms of cost and toxicity. Improvement of the material by partial substitution of Co with other transition metals is one of the alternative and effective ways to overcome the limitations and improve the electrochemical performance of cathode materials. The transition metal element used for the substitution has to be cheaper and non-toxic thus Mn is chosen here. LiCo(1-x)MnxO2 (x= 0.1, 0.2, 0.3) we synthesized by a novel route using a self-propagating combustion (SPC) method. The samples are analyzed using X-Ray Diffraction (XRD) for phase purity and Field Emission Scanning Electron Microscopy (FESEM) for morphology and particle size studies. The materials obtained are phase pure. In terms of electrochemical activity, though it does not show better first cycle discharge capacity, the Mn doped materials have improved capacity retention. Results showed that LiCo0.9Mn0.1O2 and LiCo0.8Mn0.2O2 exhibited less than 8 % capacity loss in the 20th cycle compared to 12 % for LiCoO2.

The Effect of PEG on Performance of Li0.96Na0.04Ni1/3Co1/3Mn1/3O2 as Cathode Material

2013 ◽  
Vol 575-576 ◽  
pp. 7-10
Author(s):  
Chun Xia Gong ◽  
Oluwatosin Emmanued Bankole ◽  
Li Xu Lei
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cathode Material ◽  
Cycle Performance ◽  
Initial Discharge Capacity ◽  
Capacity Retention ◽  
Peg 400 ◽  
Initial Discharge ◽  
Pure Phase ◽  
Scanning Electron

Li0.96Na0.04Ni1/3Co1/3Mn1/3O2with PEG400 or PEG2000 as additive was synthesized by coprecipitation method. Xray diffraction pattern reveals that both the products with PEG400 and PEG2000 are pure phase. Scanning Electron Microscopy shows that the average sizes of the powders are 100 nm and 80 nm, respectively. The sample with PEG 2000 has initial discharge capacity (205.8 Mah×g1) and the sample with PEG 400 exhibits good cycle performance with the capacity retention of 86.34 % after 90 cycles compared to that has no additive (167.6 mAh.g-1and 71.18 %) in the cut-off voltage of 2.0-4.5 V at 0.1 C rate. Therefore, PEG400 or PEG2000 as additive should improve the performance of Li0.96Na0.04Ni1/3Co1/3Mn1/3O2cathode material.

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