scholarly journals Spinel-type crystals based on LiFeSiO4 with high electrical conductivity for lithium ion battery formed by melt-quenching method

2012 ◽  
Vol 120 (1399) ◽  
pp. 93-97 ◽  
Author(s):  
Tsuyoshi HONMA ◽  
Takuya TOGASHI ◽  
Takayuki KOMATSU
Keyword(s):  
Electrical Conductivity ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
High Electrical Conductivity ◽  
Melt Quenching ◽  
Spinel Type ◽  
Quenching Method

Introduction of Fe2+ in Fe0.8Ti1.2O40.8− nanosheets via photo reduction and their enhanced electrochemical performance as a lithium ion battery anode

2019 ◽  
Vol 55 (2) ◽  
pp. 186-189 ◽  
Author(s):  
Xingang Kong ◽  
Xing Wang ◽  
Dingying Ma ◽  
Jianfeng Huang ◽  
Jiayin Li ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrochemical Performance ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Enhanced Electrochemical Performance ◽  
Battery Anode

Fe2+ doped Fe0.8Ti1.2O40.8− nanosheets were prepared via delaminating H0.8Fe0.8Ti1.2O4 precursor and further photo reduction. It shows improved electrochemical performance due to the enhanced electrical conductivity by the introduction of Fe2+.

scholarly journals LiOH/Coconut Shell Activated Carbon Ratio Effect on the Electrical Conductivity of Lithium Ion Battery Anode Active Material

Molekul ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 235
Author(s):  
Annisa Syifaurrahma ◽  
Arnelli Arnelli ◽  
Yayuk Astuti
Keyword(s):  
Electrical Conductivity ◽  
Activated Carbon ◽  
Lithium Ion Battery ◽  
Surface Area ◽  
Active Material ◽  
Lithium Ion ◽  
Coconut Shell ◽  
Coconut Shell Activated Carbon ◽  
Anode Active Material ◽  
Battery Anode

A lithium ion battery anode active material comprised of LiOH (Li) and coconut shell activated carbon (AC) has been synthesized with Li/AC ratios of (w/w) 1/1, 2/1, 3/1, and 4/1 through the sol gel method. The present study aims to ascertain the best Li/AC ratio that produces an anode active material with the best electrical conductivity value and determine the characteristics of the anode active material in terms of functional groups, surface area, crystallinity, and capacity. Based on the electrical conductivity test using LCR, the active material Li/AC 2/1 had the highest electrical conductivity with a value of 2.064x10-3 Sm-1. The conductivity achieved was slightly smaller than that of the active material with no addition of LiOH on the activated carbon at an electrical conductivity of 5.434x10-3 Sm-1. The FTIR spectra of the activated carbon and Li/AC 2/1 showed differences with in the Li-O-C group absorption at 1075 cm-1 wavenumber and the wide absorption in the area of 547.5 cm-1 that represents Li-O vibration. Based on the results of SAA, the activated carbon had a larger surface area than Li/AC 2/1 at 17.057 m2g-1 and 5.615 m2g-1, respectively. The crystallinity of both active materials was low shown by the widening of the diffraction peaks. Tests with cyclic voltammetry (CV) proved that there was a reduction-oxidation reaction for the two samples in the first cycle with a large charge and discharge capacities of the activated carbon of 150.989 mAh and 92.040 mAh, while for Li/AC 2/1 they were 91.103 mAh and 47.580 mAh.

Comparison of the DC and AC Conductivities of Li2O-P2O5 Glass

2008 ◽  
Vol 368-372 ◽  
pp. 1449-1450
Author(s):  
Ji Yong Pan ◽  
Xue Qiang Cao
Keyword(s):  
Conduction Mechanism ◽  
Lithium Ion ◽  
Dc Conductivity ◽  
Ac Conductivities ◽  
Impedance Spectra ◽  
Melt Quenching ◽  
Ion Conductor ◽  
Oxygen Ion ◽  
The Difference ◽  
Quenching Method

Lithium phosphate glass with composition of 45Li2O-55P2O5 (in mol%) was prepared by the conventional melt quenching method and the electrical properties were examined by DC conductivity and impedance spectra. It was found that the difference between DC conductivity and DCtot conductivity deduced from impedance spectra was distinct. Difference of activation energies obtaining by DC and DCtot conductivity implied that the conduction mechanism was different. The glass of 45Li2O-55P2O5 is lithium ion conductor while the oxygen ion in the glass can migrate in some conditions.

Neutron diffraction and Raman analysis of LiMn1.5Ni0.5O4 spinel type oxides for use as lithium ion battery cathode and their capacity enhancements

2016 ◽  
Vol 284 ◽  
pp. 28-36 ◽  
Author(s):  
Pushpaka B. Samarasingha ◽  
Niels H. Andersen ◽  
Magnus H. Sørby ◽  
Susmit Kumar ◽  
Ola Nilsen ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Spinel Type ◽  
Raman Analysis

Synthesis and electrochemical performance of spinel-type LiMn2O4 using γ-MnOOH rods as self-template for lithium ion battery

2012 ◽  
Vol 220 ◽  
pp. 228-235 ◽  
Author(s):  
Lei He ◽  
Shichao Zhang ◽  
Xin Wei ◽  
Zhijia Du ◽  
Guanrao Liu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Spinel Type

Germanium-based multiphase material as a high-capacity and cycle-stable anode for lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89176-89180 ◽  
Author(s):  
Dohyoung Kwon ◽  
Sinho Choi ◽  
Guoxiu Wang ◽  
Soojin Park
Keyword(s):  
Electrical Conductivity ◽  
Lithium Ion Batteries ◽  
Carbothermic Reduction ◽  
High Capacity ◽  
Reduction Process ◽  
Lithium Ion ◽  
High Electrical Conductivity ◽  
Capacity Retention ◽  
Multiphase Material

Cu-incorporated porous Ge-based anodes with high electrical conductivity are prepared by a simple carbothermic reduction process of CuGeO3. The Cu–Ge-based anodes exhibit outstanding capacity retention at 25 °C and 60 °C.

scholarly journals Synthesis of Clustered Mn3O4 Nanoparticles through a Polymer Surfactant Mediated Route on Few-Layer Graphene Nanoplatelet Surface and its Application for Electrochemical Energy Storage: Lithium-ion Battery Anode

2020 ◽  
Author(s):  
Debkumar Saha ◽  
Lawrence T. Drzal
Keyword(s):  
Electrical Conductivity ◽  
Lithium Ion Battery ◽  
Graphene Nanosheets ◽  
High Surface ◽  
High Surface Area ◽  
Lithium Ion ◽  
Layer Graphene ◽  
Carbon Substrates ◽  
Few Layer Graphene ◽  
Battery Anode

<p>Composites synthesized through the deposition of Mn<sub>3</sub>O<sub>4</sub> on graphene, carbon nanotube and other carbon based materials have attracted much attention recently as potential electrode materials for different electrochemical applications such as pseudocapacitor; Lithium-ion battery; and catalysis. The primary reason Mn<sub>3</sub>O<sub>4</sub> is grown on these substrates in spite of having high charge storage capacity as pseudocapacitor or Lithium-ion battery electrodes on its own is to enhance its electrical conductivity and/or to impart flexibility to the electrode, which is difficult for a fully metallic electrode. Higher electrical conductivity prolongs the cycle life of an electrode. In addition, the substrate contributes capacity and thus, enhances the overall energy density of an electrode. Mn<sub>3</sub>O<sub>4 </sub>acts as a spacer and keeps graphene nanosheets separated when used as the substrate for capacitor electrode fabrication. This helps retain the high surface area of graphene nanosheets in the electrode which contributes additional capacitance. Mn<sub>3</sub>O<sub>4 </sub>supported on graphene and other carbon substrates have recently been investigated as catalyst for methanol electro-oxidation in alkaline media; CO oxidation; and Oxygen reduction reaction (ORR). High surface area substrate uniformly distributes metal particles and prevents their agglomeration and dissolution during catalytic process. In addition, high electrical conductivity of graphene and carbon substrates enhances the electronic conductivity of Mn<sub>3</sub>O<sub>4</sub> which is of importance for superior catalytic activity. Composite of Mn<sub>3</sub>O<sub>4</sub> combined with carbon based substrate has also found non-electrochemical application such as the removal of Pb and Cu ions from aqueous solution because of their adsorptive behaviour.<b></b></p> <p>A myriad of procedures have been adopted for the synthesis of Mn<sub>3</sub>O<sub>4</sub> on graphene or other carbonaceous substrates. All of these methods involve one or more of the following factors that complicate the process, such as: long synthesis time; high synthesis temperature; use of hazardous/toxic chemicals; multistep process and the requirement for sophisticated device or highly controlled environment. In fact, the complicacies associated with the synthesis of Mn<sub>3</sub>O<sub>4</sub> have already been acknowledged and investigations have been directed at finding relatively simpler route such as the use of microwave technique. <b></b></p> <p>In this research, we report the synthesis of clusters of nearly octahedral shapedn Mn<sub>3</sub>O<sub>4</sub> nanoparticles on few-layer graphene nanoplatalet (GnP) surface through a simple, wet-chemical, polyethyleneimine (PEI) mediated route. Few-layer graphene nanoplatelets are ultrathin particles of graphite prepared through proprietary intercalation and exfoliation method (XG Sciences, Inc., Lansing, MI, USA). The components involved in this synthesis method are manganese salts (KMnO<sub>4</sub> and MnSO<sub>4</sub>.H<sub>2</sub>O); water; PEI; and GnP as the substrate. The synthesis is carried out at a temperature of 80°C only and in open air. Highly crystallized Mn<sub>3</sub>O<sub>4</sub> particles, as observed by X-Ray Diffraction (XRD), can be synthesized on GnP surface. It has also been observed that PEI acts as a reducing agent and as a capping agent on a continuous network of ribbon-like Birnessite-MnO<sub>2</sub> (IV) to produce a nearly octahedral shaped nanoparticles of Mn<sub>3</sub>O<sub>4</sub> (II, III). It has already been mentioned that composites of Mn<sub>3</sub>O<sub>4</sub> on graphene or other carbonaceous substrates find a myriad of applications. Thus, our research findings to synthesize GnP-Mn<sub>3</sub>O<sub>4</sub> composite through a simple method should be of interest to a broad group of researchers. In this research, we have investigated the performance of this composite system as a Lithium-ion battery anode only. Our preliminary investigations reveal that the Mn<sub>3</sub>O<sub>4</sub> composite synthesized through this method has just as much potential as the ones prepared through other alternative methods.</p>

Thionated Benzo[c]thiophen-1(3H)-one as Organic Cathodes with High Capacity for Sulfur-rich All Organic Lithium-ion Battery

2021 ◽  
Author(s):  
Bingjie Zhang ◽  
Xiaodong Yang ◽  
Ben He ◽  
Qiqi Wang ◽  
Zishun Liu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Organic Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
High Solubility ◽  
Environmental Friendliness ◽  
High Theoretical Capacity

Organic materials have potential advantages in lithium-ion batteries (LIBs) due to their environmental friendliness, flexible designability, and high theoretical capacity. However, the commonly low electrical conductivity and high solubility of...

Stable LATP/LAGP double-layer solid electrolyte prepared via a simple dry-pressing method for solid state lithium ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 92579-92585 ◽  
Author(s):  
Erqing Zhao ◽  
Furui Ma ◽  
Yudi Guo ◽  
Yongcheng Jin
Keyword(s):  
Electrical Conductivity ◽  
Solid Electrolyte ◽  
Lithium Ion ◽  
High Electrical Conductivity ◽  
High Chemical ◽  
Pressing Method ◽  
Calcination Process ◽  
Dry Pressing ◽  
Excellent Stability ◽  
High Chemical Stability

A LATP/LAGP bi-layer structured solid electrolyte has been prepared via a simple dry-pressing and post-calcination process, which exhibits high electrical conductivity and excellent stability in air as well as high chemical stability against Li.

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