LG Chem

About: LG Chem is a based out in . It is known for research contribution in the topics: Battery (electricity) & Electrode. The organization has 8682 authors who have published 8654 publications receiving 71215 citations. The organization is also known as: LG Chemical.

The Current Move of Lithium Ion Batteries Towards the Next Phase

Abstract: Application targets of lithium ion batteries (LIBs) are moving from small-sized mobile devices of information technology to large-scale electric vehicles (xEVs) and energy storage systems (ESSs). Environmental issues and abruptly increasing power demands are pushing high performance energy storage devices or systems onto markets. LIBs are one of the most potential candidates as the energy storage devices mainly due to their high energy densities with fairly good rate capabilities and a fairly long cycle life. As battery systems become larger in terms of stored energy as well as physical size, the safety concerns should be more seriously cared. Each application target has its own specification so that electrode materials should be chosen to meet requirements of the corresponding application. This report diagnoses the current market trends of LIBs as a primary topic, followed by giving an overview of anode and cathode material candidates of LIBs for xEVs and ESSs based on their electrochemical properties.

The genome sequence of segmental allotetraploid peanut Arachis hypogaea

Abstract: Like many other crops, the cultivated peanut (Arachis hypogaea L.) is of hybrid origin and has a polyploid genome that contains essentially complete sets of chromosomes from two ancestral species. Here we report the genome sequence of peanut and show that after its polyploid origin, the genome has evolved through mobile-element activity, deletions and by the flow of genetic information between corresponding ancestral chromosomes (that is, homeologous recombination). Uniformity of patterns of homeologous recombination at the ends of chromosomes favors a single origin for cultivated peanut and its wild counterpart A. monticola. However, through much of the genome, homeologous recombination has created diversity. Using new polyploid hybrids made from the ancestral species, we show how this can generate phenotypic changes such as spontaneous changes in the color of the flowers. We suggest that diversity generated by these genetic mechanisms helped to favor the domestication of the polyploid A. hypogaea over other diploid Arachis species cultivated by humans.

Controlled Prelithiation of Silicon Monoxide for High Performance Lithium-Ion Rechargeable Full Cells

Abstract: Despite the recent considerable progress, the reversibility and cycle life of silicon anodes in lithium-ion batteries are yet to be improved further to meet the commercial standards. The current major industry, instead, adopts silicon monoxide (SiOx, x ≈ 1), as this phase can accommodate the volume change of embedded Si nanodomains via the silicon oxide matrix. However, the poor Coulombic efficiencies (CEs) in the early period of cycling limit the content of SiOx, usually below 10 wt % in a composite electrode with graphite. Here, we introduce a scalable but delicate prelithiation scheme based on electrical shorting with lithium metal foil. The accurate shorting time and voltage monitoring allow a fine-tuning on the degree of prelithiation without lithium plating, to a level that the CEs in the first three cycles reach 94.9%, 95.7%, and 97.2%. The excellent reversibility enables robust full-cell operations in pairing with an emerging nickel-rich layered cathode, Li[Ni0.8Co0.15Al0.05]O2, even at a commerci...

Cable-type flexible lithium ion battery based on hollow multi-helix electrodes.

Abstract: An important focus in product design is the creation of practical and aesthetic devices. In portable electronics, in particular, the limiting factor is often the shape of the battery; indeed, removal of this battery restriction would constitute a disruptive technology that could open up a path for design innovation. [ 1 ] However, despite the development of smaller, thinner, and lighter batteries, the existing battery technology is still far from realizing such design fl exibility, mainly owing to the fi xed shapes, i.e., cylindrical, prismatic, or pouch shape. [ 2 ] Hence, there is increasing recognition of the need for a new concept that would permit various product designs previously impossible with traditional technologies. To this end, fl exible batteries are considered a promising solution, owing to their potential to adapt to mechanical stress and accordingly change shape. Furthermore, the progress made in fl exible electronics such as roll-up displays and wearable electronics would receive a strong stimulus with the development of bendable/twistable batteries. [ 3 ] Several recent studies of energy conversion devices have focused on the development of fl exible batteries or supercapacitors [ 4–7 ] using soft materials such as poly mer electrolytes, [ 8 ] nanometer-sized active materials, [ 9–14 ]