Papers by Keyword: Lithium-Ion Battery

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Authors: Dan Feng Qiu, Yong Jun Xia, He Qing Ma, Gang Bu
Abstract: Graphene-NiO nanocomposites were prepared via a solvothermal method. The nanostructure and morphology of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). SEM and TEM results indicated that NiO nanoplates distributed homogeneously on graphene sheets. The electrochemical properties of the samples as active anode materials for lithium-ion batteries were examined by constant current charge-discharge cycling. With graphene as conductive matrix, homogeneous distribution of NiO nanoplates can be ensured and volume changes of thenanocomposite during the charge and discharge processes can be accomodated effectively, which results in good electrochemical performance of the composites.
Authors: T.Q. Tan, S.P. Soo, A. Rahmat, J.B. Shamsul, Rozana A.M. Osman, Z. Jamal, M.S. Idris
Abstract: Nowadays, many researchers have been studying on the layered rock salt-type structure as cathode materials for the lithium ion batteries. LiCoO2 is the most commonly used cathode material but Co is costly and toxic. Thus, alternative cathode materials which are cheaper, safer and having higher capacity are required. Replacing Co with Ni offered higher energy density battery but it raised interlayer mixing or cation disorder that impedes electrochemical properties of batteries. This paper has reviewed some recent research works that have been done to produce better and safer cathode materials from the structural perspective.
Authors: Gui Yang Liu, Jun Ming Guo, Li Li Zhang, Bao Sen Wang, Ying He
Abstract: In this paper, spinel LiMn2O4 was prepared by the solution combustion synthesis using acetate or nitrate salts as raw materials and acetic acid as fuel. The composition and phase structure are determined by X-ray diffraction (XRD) and the electrochemical performance is tested by using a coin type half-battery versus Li+/Li. The results indicate that the products prepared from acetate salts have higher purities, higher crystallinities and better electrochemical performances than these of the products prepared from nitrate salts. And for the products prepared from acetate salts, the performance becomes worse with increasing acetic acid ratios. Contrarily, for the products prepared from nitrate salts, the performance becomes little better with increasing acetic acid ratios.
Authors: Jian Peng, Wei Dong Xiao, Xiu Pin Huang
Abstract: The monitor of lithium-ion battery health is becoming a challenge because the performance of battery is effect by many environment factors. To address this problem, a new health monitor method based on Multivariate State Estimation Technique (MSET) and Sequential Probability Ratio Test (SPRT) is proposed in this paper. In order to demonstrate the performance gain of the method, a detailed experiment is performed based on a lithium-ion battery. By the comparison of performance parameters actual residuals and healthy residuals driven from the training data based on MSET, the fault detection can be implemented based on the SPRT.
Authors: Cai Hong Ding, Pei Liu
Abstract: With the increasing demand of the consistency on li-ion batteries, to be more stable and consistency for the holding force upon the battery’s charging by the electrode tab-clamps during the battery forming process becomes the basic requirements. This paper offers a new method to test the holding force of a spring clips by using a membrane-type force-sensitive resistive sensor as sensing element. According to the experiment and analysises, this paper also shows the linear fitting on the Pressure-Resistance Characteristic Curve of the sensor, which is close to the actual situation, and provides a basis for the follow-up data processing of the testing system. Multi-groups analysis of experimental data indicates that it is a simple and feasible method to test the holding force of the spring clips using in li-ion battery charging and discharging.
Authors: Hong Zhang Cen, Xue Zhe Wei, Hai Feng Dai, Li Song
Abstract: In this article a multi-dimensional coupled electro-thermal model of a LFP battery is proposed. The model includes a 1-d model based on porous-electrode theory and a 3-d battery model solving the temperature distribution of the battery. These models are coupled through heat generation rate during discharging process. Moreover, an experiment is designed to check the inside temperature information of the battery.
Authors: A.R. Saatchi, E. Ghanbari, A. Saatchi, K. Raeissi, H. Tavanai, S. Mirza Khanlouei
Abstract: Electrospinning is a straightforward and low cost method for producing carbon nanofiber (CNF) webs that have interrelated pores with high surface area. The process begins with electrospinning of polyacrylonitrile (PAN) on a Cu target collector. In current production methods, the PAN nanofiber web is taken off from the collector. But in order to omit extra stages of taking off the web from a conductive collector and later putting it back on, we will try to keep the web remained on the Cu collector plate through the carbonizing heat treatment and the electrodeposition, to later use the plate as the current collector of a LIB anode. This facilitates the handling of CNFs throughout the entire process that is now much more suitable for commercialization. This unique structure is very suitable for anode materials (AMs) of Lithium Ion Batteries (LIBs). It improves the kinetics of charge/discharge cycles by reducing lithium transport paths, and creates more stable electrochemical performance by providing space for volume expansions of lithium insertions in charging cycles. CNF webs can be used as AMs, demonstrating these advantages over conventional carbonaceous materials that have long been used as the preferred choice-in spite of having a comparatively low theoretical capacity. In this study we use the CNF web as a template for electrodepositing Sn-Sb alloy, to create the mentioned structural characteristics in a coated layer of an alloy with a higher capacity. The resulting composite is shown to have a higher capacity than the substrate CNF and a good cycling performance.
Authors: Chi Yang
Abstract: The reaction of N2 with lithium at electrode in lithium ion batteries was reported in this paper. At room temperature, N2 can react with lithium, mainly at anode, to form Li3N in an electrochemical system very easily during charge-discharge cycles. Li3N has been characterized by XPS. Experimental results also revealed that the higher of the current density and higher of the temperature resulted in quicker of the nitrogen-fixation reaction. The reaction can be brought about almost completely in the lithium ion batteries at room temperature. This could be a new method for preparation of Li3N at room temperature.
Authors: Jiang Wei, Jian Xiong Liu, Yu Chun Dang, Kun Xu, Yi Zhou
Abstract: TiO2 has large potential ability in Lithium-ion batteries due to its high energy density and safety. The main reasons that limit the performance of TiO2 electrode is its low real capacity which caused by poor conductivity and other factors. Varying bulk TiO2 materials to nanoscale is believed a promising method as it could increase Li insertion sites, short the ions diffusion distance and enhance the kinetics. In addition, doping heterogeneous elements or compositing other conductivity materials could enable TiO2 to improve electron transfer ability. In this paper, we reviewed the electrochemical performance of some nanostructured TiO2 and analyzed the merits and weaknesses. Some challenges and perspectives for future research were also discussed.
Authors: K. Karuppasamy, R. Antony, S. Alwin, S. Balakumar, X. Sahaya Shajan
Abstract: Nanocomposite polymer electrolytes (NCPEs) have been playing a considerable role in the development of alternative clean and sustainable energy technologies. This review article summarizes the recent research progress on the synthesis and characterization of NCPEs and its application in lithium ion battery based energy storage devices. First, an introduction on the properties, synthesis strategies and use of NCPEs is briefly given, followed by a state-of-the-art review on the preparation of NCPEs and their electrochemical properties in lithium ion battery (LIB) applications. Finally, the prospects and future challenges of NCPEs for energy storage are discussed
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