[PDF] Top 20 Improved Electrochemical Performance of LiMn2O4 /Graphene Composite as Cathode Material for Lithium Ion Battery

... (DEC)-ethyl methyl carbonate (EMC) mixture (1:1:1). Micro-porous polypropylene separator was used in those cells. The cell preparation was carried out in an Ar-filled dry box. The charge/discharge cycles for assembled ... See full document

... During the past decades, many achievements have been obtained in the electrochemical energy storage system [1, 2]. These energy storage systems included Li-ion batteries, Li-Air batteries, Li-S batteries ... See full document

... improved over that of the non-doped material, particularly at elevated temperatures. The Mg-modified cells also exhibited excellent discharge rates performance at 10 o C. The current study findings ... See full document

... the performance of metal oxide/graphene composites is mainly due to the individual properties of each composite component and the peculiar synergies produced by the different structures formed by ... See full document

... the lithium ion battery in the early 1990s, its development has been very fast and it has been widely applied as power source for a lot of light and high value electronics due to its significant ... See full document

... The cathode materials with special structure and morphology could increase their specific capacity and cycling performance, aiming to overcome the mechan- ical strain arising from the huge volume variation ... See full document

... The composite cathodes were made by dispersing active material (80 ...using lithium metal as the counter electrode, Celgard 2325 as the separator, and 1 M LiPF6 in 1:1 EC:DEC solution as the ... See full document

... Cell with E3 exhibits a semicircle with smallest diameter, suggesting a lowest charge transfer resistance. On the other hand, although the charge transfer resistance of cell with E2 is larger than the cell with E3, it is ... See full document

... commercial cathode materials for lithium ion batteries are mainly carbon materials, but there are many problems in the application of carbon materials, such as short cycle performance, safety ... See full document

... analyze electrochemical reactions, such as those processes occurring at electrode/electrolyte interfaces and the lithium ion intercalation/deintercalation occurring in anode/cathode, and has ... See full document

... significantly improved than that of the pure one, which was attributed to better ionic and electronic conductivity of the samples after doping with Al 3+ ...been improved greatly, among which, Al 3 showed ... See full document

... of cathode material and evaporates the entire area of solvent ...drying performance of using NIR drying process has been conducted and analyzed the electrochemical performance of spinel ... See full document

... The cathode material film cut into wafers, and then placed in a vacuum to dry at 80℃ for 10 hours and ...simulated battery case and the current collector were placed into a vacuum oven at 80℃ for 8 ... See full document

... technique with post-annealing treatment. The microstructure of the thin films is characterized by X-ray diffraction, environmental scanning electron microscopy, X-ray photoelectron spectroscopy and atomic force ... See full document

... Raman spectra of composites were taken to verify the reduction of graphene in the samples and explored the surface properties of the samples (Fig. 3). The samples exhibit characteristic Raman peaks of carbon at ... See full document

... For over a century, petroleum-derived fuels have been the first choice as an energy source for transportation, and accounted for more than 71.4% of U.S. petroleum use in 2009 [1]. Although the petroleum-based fuel energy ... See full document

... the cathode without Al foil is about 35 μm, which is more thicker than most of V2O5-based ...cathodes. Electrochemical measurements were carried out using coin-type cells ...(CR2032). Lithium plates ... See full document

... The superior electrochemical performances of V2O5 could be ascribed to the unique structure revealing the presence of a large 001 crystal planes interlayer spacing ∼11.53 Å, which provid[r] ... See full document

... The Lithium coin cells were assembled using the as-prepared cathode, a lithium metal foil as counter electrode and a porous polypropylene film (Celgard 2400) as a ...EC/DMC. Lithium coin cells ... See full document

... 1:1 (v/v) mixture of ethylene carbonate and diethyl carbonate. The cell was assembled in an argon- filled glove box and tested using charge-discharge system in the voltage range of 3.0-4.3 V vs. Li + /Li at different ... See full document