Lithium-ion Battery Market Research Articles

A Novel Surface Modified Nano-Silicon As Promising Anode Material Lithium-Ion Batteries

Silicon has been considered as one of the most promising anode materials for LIBs in order to replace the conventional anode material (graphite). Investigations of the Li-Si binary system indicated at least theoretically, the highest specific capacity (4200 mAh/g), during the electrochemical lithium alloying (Li4.4Si) of silicon with lithium ions. Unfortunately, Si shows a very low mechanical elasticity during the battery cycling (lithiation/delithiation), which causes a contact loss in the electrode and subsequently lead to a shorter cycle life and finally fast capacity fading. This is the major drawback of Si as an anode material and the reason why a general distribution within the lithium ion battery market couldn´t be established up to now. The first idea proposed to overcome this shortcoming, is a new approach concerning the binder materials. In the research of energy storage materials, a new technology named biomimetics has been adapted to breakthrough the serious technical problem. The use of bioinspired binders for the silicon anode materials represents one basic approach of our present study. Namely, potato starch, gelatine and alginic acid from brown algae were studied as a binder. It was found that the potato starch was the best binder, exhibiting 1500 mAh/g at the 20thcycle. This is due to the fact that amylopectin polysaccharides suppress the volume change of silicon and form a beneficial SEI film on the electrode during cycling. The second idea proposed in this work is based on the formation of a nanoscale, 3D-connected mesoporous silicon by a magnesiothermic reduction process, providing short diffusion pathways for the lithium ions during lithiation / delithiation. The silicon-based cells were characterized by electrochemical investigations and the first results show that the mesoporous silicon-based cell exhibits a discharge capacity of 1200 mAh/g and a coulombic efficiency of 84% after the cycling precondition with 0.05C. The improvement of the electrical conductivity and the modification of the surface´s electrochemical properties is achieved by an adaption of a coating method, known as substrate-induced coagulation. The coating materials are distinguished between lithium reactive and nonreactive. Further, they can be subdivided, i.e. carbonaceous materials (nano-graphite, graphene), nano metals (Cu, Ni) and nano metal oxides [TiO2, In(OH)3, ITO(indium tin oxide)].

Evaluation of Electrochemical Performance of Recovery Silicon from Waste Silicon Sludge As Lithium Ion Battery

Recently, in terms of Lithium ion battery market has been widely growing up from mobile IT devices into Electrical Vehicle market. The battery is the most important part in xEV than any other parts. Anode materials in lithium ion battery, those price evaluated about 10 % in composition of typical lithium ion battery. However, the price of anode parts including carbon or silicon materialss were very unstable. It absolutely relies on importation in korea. The silicon which has superior theoretical specific capacity than commercial anode materials (Si = 4200 mAh/g, Carbon = 372 mAh/g), To develop silicon based anode materials for lithium ion battery, raw material of silicon should be priceless and stable supply chain.To figure out these unstable raw material market, we had been focused on waste silicon sludge which were gathered by process for silicon wafer back grinding. The waste silicon sludge were discarded over 2000 ton/year, all of them are currently buried in korea. Waste silicon sludge were consists of wafer grinding materials, silicon, and water/oils. Herein, we recovered the silicon from waste silicon sludge and purified the silicon for lithium ion battery anode starting materials. Not only recovred silicon, also recovery silicon had been pulverized to nano-sized by beads-milling. these nano-sized recovery silicon induced that shorten lithium ion paths and large surface area. Malic acid was a chosen media for carbon coating on nano-sized recovery silicon surface. We analyzed among recovered silicon properties and its electrochemical performance.

Advances in lithium-ion battery research and technology

The lithium-ion battery market has undergone trememdous growth ever since Sony Corporation introduced the first commercial cell in 1990. In less than a decade, the field has become a front-runner in rechargeable battery technology. Sales of lithium-ion cells exceeded 400 million units in 1999, and the market is expected to exceed 1.1 billion units valued at more than $4 billion by 2005.

Characterization of commercially available lithium-ion batteries

With the aggressive growth of the lithium-ion battery market, several companies have recently offered their version of the lithium-ion battery for consumer purchase. This paper describes the physical design, rate, cycle-lifetime, and self-discharge performance of cells from Sony, Matsushita, A&T, Moli, and Sanyo lithium-ion batteries. The study used a total of 85 lithium-ion cells from these manufacturers. All cells performed as indicated by manufacturers' specifications and the performance and design differences are discussed. The design differences include discussion of gas chrornatography-mass spectroscopy (GC-MS) analysis of the electrolytes, a differential scanning calorimetry (DSC) analysis of separators, the activation of a positive temperature coefficient (PTC), and a comparison of the basic physical parameters of each cell. Performance characterization shows an excellent high discharge rale performance of the A&T and Matsushita cells, an excellent cycle-lifetime performance for Sony cells, and negligible effects of self-discharge.