{"id":19830,"date":"2022-03-28T10:45:49","date_gmt":"2022-03-28T09:45:49","guid":{"rendered":"https:\/\/www.innovationnewsnetwork.com\/?p=19830"},"modified":"2022-07-31T18:18:42","modified_gmt":"2022-07-31T17:18:42","slug":"cathode-manufacturing-technology-ev-batteries","status":"publish","type":"post","link":"https:\/\/www.innovationnewsnetwork.com\/cathode-manufacturing-technology-ev-batteries\/19830\/","title":{"rendered":"Cathode manufacturing technology improved for EV batteries"},"content":{"rendered":"
Scientist<\/span>s<\/span> have been <\/span>attempting <\/span>to develop solid-state batteries for EVs<\/span> because <\/span>they offer greater energy density and better range than the <\/span>lithium-ion batteries that are currently in use.\u00a0<\/span>However, th<\/span>is aim has remained out of reach, primarily due to issues regarding the composition of the battery\u2019s <\/span><\/span>cathode<\/span><\/span><\/a>. <\/span>Now, <\/span>UT scientists have developed a novel cathode manufacturing technology in order to overcome this issue.<\/span><\/span>\u00a0<\/span><\/p>\n This study, including a description of the cathode manufacturing process, has recently appeared in\u00a0Nano Research<\/em>\u00a0on 24 March 2022.<\/p>\n Rechargeable solid-state batteries are completely solid, with no liquid components, and have been pursued by scientists as the next generation of energy storage for EV batteries and other climate mitigation applications. This is because they would be lighter, more energy dense, have a faster recharging rate, and offer a greater range than the existing generation of lithium-ion batteries.<\/p>\n The liquid electrolyte utilised in the recharging rate is the medium through which the current flows between the positive and negative electrodes (the cathode and anode, respectively). However, the liquid makes the battery heavy and is also flammable, meaning that fires are not an uncommon occurrence.<\/p>\n Additionally, in a solid-state battery, a solid electrolyte made of ceramic, glass, or a polymer, is much safer because there are no leaks during transit, and it offers improved power density, cyclability, and shelf life.<\/p>\n I<\/span>n<\/span> order<\/span> to mak<\/span>e<\/span> solid-state batteries <\/span>feasible<\/span>, <\/span>scientists <\/span>must<\/span> design a good cathode that it is capable of a high operating voltage a<\/span>s well as<\/span> a <\/span>high area capacity. <\/span>A high area capacity<\/span> describes the amount of energy charge in a battery per unit of area for a given <\/span>period of time<\/span>. Th<\/span>e<\/span> unit frequently u<\/span>tilise<\/span>d to describe this quantity is the milliampere-hour (<\/span>mAh<\/span>)\u2014or the amount of energy charge that will allow one amp of current to flow for an hour<\/span> \u2014<\/span> compared to a given amount of area (typically measured in square centimetres, or cm<\/span><\/span>2<\/span><\/span><\/sup>). \u202f<\/span><\/span>\u00a0<\/span><\/p>\n In essence, this measurement, mAh\/cm2<\/sup>, indicates how long a battery will last without having to recharge it, for the amount of space it takes up in a device.<\/p>\n \u201cMost of the composite cathode manufacturing technologies that have been explored so far result in batteries that do not even match the performance of existing commercial batteries, let alone exceed them, hitting around 3 mAh\/cm2<\/sup>,\u201d explained Jizhang Chen, lead author, from the College of Materials Science and Engineering at Nanjing Forestry University.<\/p>\n Additionally, these cathode technologies also suffer from the requirement of an excessive number of binders and conductive agents. This is to ensure that all of the active particles are uniformly spread out, which reduces the density of the cathode, increases the cost, and produces an excessive amount of resistance at the interface of the cathode and electrode.<\/p>\nWhy do scientists want to develop rechargeable solid-state batteries?<\/h3>\n
Can scientists make these batteries work with this new technology?<\/h3>\n