Anode materials in Li-ion batteries Research Paper

Anode materials in Li-ion batteries - Research Paper Example Moreover, future development requires different ways of improving the anode materials which shall be discussed in this paper. The paper would be of prime importance for engineers and electronic professionals dealing in Li-ion Batteries whereas it will also benefit other researchers and people who are interesting in learning about the anode materials. Description Li-ion Battery is also known as Lithium ion battery which is primarily used as rechargeable support to different electronic devices. Currently its market sell is around 11 billion which is expected to reach 60 billion by 2020 (Li-ion batteries). Due to the technological advancements human lives are now prominently dominated by electronic gadgets and other devices. These portable electronic items require immense support of rechargeable batteries and hence Lithium ion Battery performs a very crucial role in the technological development. However, these batteries are associated with another important factor which directly impact s their performance and efficiency i.e. the properties of Anode materials used (Li-ion batteries). Source: Futurity 1 Li-ion batteries function on the basis of discharge and recharge of lithium ions. When Lithium ions are transferred from anode to cathode the Li-ion battery discharges. Subsequently it is attached to a socket in order to recharge the ions which now travel in opposite direction i.e. from cathode to anode. The property of materials used in anode substantially affects the capacity and performance of the battery. If some lapses occur in the performance of batteries then particular anode materials are replaced with substances having more capacity, density, battery life cycle, life span of the charge etc. (Li-ion batteries). The chemical reactions taking place in Li-ion batteries are presented below: Complete reaction in a cell of Li-ion Battery At Anode At Cathode The following diagram depicts the Li-ion battery in a functioning state and the movement of ions can be close ly observed. Source: Nexeon 1 Properties of Anode Materials Different anode materials are used in Lithium batteries depending upon the requirement of chargeable devices. The selection of material is further associated with the capacity constraints and the overall life of the battery. Graphite is commercially used in Li-ion battery. The first generation of Li-ion batteries was primarily operated with graphite anode material because it was found beneficial in placing the Lithium ions in to variable layers. Later on these materials were changed due to the limited capacity of graphite to store charge i.e. 300mAhg-1 (Li-ion batteries). Extensive research was conducted so as to identify other suitable materials which could be placed at anode and consequently silicon was examined to be more productive than graphite. Silicon gives the maximum gravimetric capacity while increasing the battery life. The volumetric capacity of anode significantly enhances with the insertion of lithium ions tak e in to the silicon material (Li-ion batteries). When a Li-ion battery is charged which is primarily designed with silicon anode material then the lithium ions enter the silicon ions subsequently increasing the volume by 400%. On the other hand when the battery discharges the lithium ions are removed from silicon material hence decreasing the overall volume. Although silicon has found to be more efficient than the graphite anodes but the continuous contraction and expansion ultimately causes

Phase 3 Discussion Board (LOG676) Coursework Example | Topics and Well Written Essays - 750 words

Phase 3 Discussion Board (LOG676) - Coursework Example The paper will compare the involvement of the United States in humanitarian supply chains and that of Kenya. In 2004, the earthquake and tsunami claimed close to 230000 lives while displacing 1.7 million other people. In the United States, the response was unprecedented and unequaled mobilizing over US$565 million, in both cash and kind. Kenya has been involved in hosting refugees drawn from the neighboring war-torn Somalia and Sudan as well as providing soldiers under AMISON. In any disaster response management as pointed out by practitioners, and researchers, the effectiveness of any emergency drill rely entirely on logistic speed and efficiency. While both countries face the same problems like the impact of political and decision makers in the humanitarian supply chain, other factors such as certainty as well as challenges in the supply of materials, are unique to either. With disaster management efforts measured in terms of uncertainty and complexity, the United States is better equipped with rapid response materials. The main humanitarian arms in the U. S government are the State Department’s Bureau of Population, Refugees and Migration, USAID, which work with the intergovernmental organizations like the UNHCR CARE and the Catholic Relief Services. While in Kenya, the Kenya Defense Forces, and the Red Cross standout. In my opinion, what makes the response of the United States more concerted is the almost seamless organization in the structure of disaster management as compared to Kenya. Companies involved in roles such as donors, collectors, and providers seem to be well synchronized. It explains why most interventions such as those in Afghanistan and the Iraqi were successful. Companies also offer technological support and staff who are tasked with ensuring efficiency. Thus, the technological advancements help the staff access remote and almost inaccessible areas (Lee, 2003). The United States, as opposed to Kenya, has also ensured that there