Realising the UK Value-chain in Graphene Composite Battery Materials (GRAVITY)

实现英国石墨烯复合电池材料价值链（GRAVITY）

• 批准号: 10007484
• 金额: $ 73.67万
• 依托单位: ANAPHITE LIMITED
• 依托单位国家: 英国
• 项目类别: Collaborative R&D
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=10007484
• 关键词: Realising; UK; Value; chain; Graphene

Climate change is one of the greatest threats facing humanity, and transitioning to sustainable energy is paramount to the survival of our species. Transport is Europe's single largest source of CO2, responsible for 25% of the continent's greenhouse gases emissions. A transition from internal combustion engines to electric vehicles (EVs), along with a grid powered by sustainable energy, can help mitigate climate change. This transition can be accelerated if customers choose to purchase EVs over cars with internal combustion engines. However, there are multiple barriers to widespread EV adoption, including long battery-charging times, uncertainties over battery lifetimes. This project seeks to address these barriers by developing graphene-composite electrodes via an inherently scalable and inexpensive process that is compatible with existing industry. Electrons are more mobile in graphene than almost any other known material, travelling thousands of times faster than in metals. Because of this, graphene has outstanding electrical properties, and these can be used to enhance Li-ion batteries (LIBs). The cathodes of most LIBs are formed of small particles of metal-oxides, such as nickel manganese cobalt oxide (NMC). These are good at storing Li+ ions, but poor electrical conductors. To enhance electrical conductivity, these particles are coated in carbon black (essentially high-grade soot); however, graphene has far superior electrical properties, and therefore can significantly increase the electrical conductivity of electrodes in the battery. It is extremely challenging to create a high-quality graphene-metal-oxide composite. This is because the graphene nano-sheets have a tendency to stick to other graphene nanosheets in preference to the metal-oxide particles. Multiple approaches have been applied to address this problem; however, to-date these have not succeeded, largely because the process results in poor quality graphene (e.g., using reduced graphene oxide), or uses surfactants, resulting in undesirable residues in the materials. Anaphite has developed a low-cost scalable process to form graphene-metal-oxide composites, which is compatible with the rapidly scaling LIB manufacturing infrastructure. Anaphite's composite materials are suitable for creating batteries with faster charging times. Batteries formed using this technology will also last longer due to the improved electrical performance of the electrodes

气候变化是人类面临的最大威胁之一，向可持续能源过渡对我们物种的生存至关重要。交通运输是欧洲最大的二氧化碳排放源，占欧洲大陆温室气体排放量的25%。从内燃机到电动汽车（EV）的过渡，沿着由可持续能源供电的电网，可以帮助缓解气候变化。如果消费者选择购买电动汽车而不是内燃机汽车，这种转变可以加速。然而，电动汽车的广泛采用存在多种障碍，包括电池充电时间长，电池寿命的不确定性。该项目旨在通过与现有行业兼容的固有可扩展和廉价的工艺开发石墨烯复合电极来解决这些障碍。电子在石墨烯中的移动的性比几乎任何其他已知材料都要高，比在金属中的速度快数千倍。正因为如此，石墨烯具有出色的电学性能，这些特性可用于增强锂离子电池（LIB）。大多数LIB的阴极由金属氧化物的小颗粒形成，例如镍锰钴氧化物（NMC）。这些都是良好的存储锂离子，但不良的电导体。为了增强导电性，这些颗粒被包裹在炭黑（基本上是高级烟灰）中;然而，石墨烯具有远为优越的上级电性能，因此可以显著增加电池中电极的导电性。制造高质量的石墨烯-金属-氧化物复合材料是极具挑战性的。这是因为石墨烯纳米片具有优先于金属氧化物颗粒粘附到其他石墨烯纳米片的倾向。已经应用了多种方法来解决这个问题;然而，迄今为止这些方法都没有成功，主要是因为该方法导致质量差的石墨烯（例如，使用还原的氧化石墨烯）或使用表面活性剂，导致材料中不希望的残留物。Anaphite开发了一种低成本的可扩展工艺来形成石墨烯-金属氧化物复合材料，该工艺与快速扩展的LIB制造基础设施兼容。Anaphite的复合材料适用于制造充电时间更快的电池。由于电极的电气性能得到改善，使用这种技术形成的电池也将持续更长时间