Decentralised finance (DeFi) has quickly gained pace in the Ethereum ecosystem, revolutionising traditional financial services thanks to its decentralised, permissionless nature. However, as DeFi applications expand, Ethereum's scaling restrictions become more obvious, limiting its capacity to meet the growing need for high transaction throughput and low latency. In response to this critical dilemma, this study presents a thorough investigation of novel consensus methods designed expressly for the unique needs of DeFi applications. By investigating the design and testing of novel consensus algorithms, as well as the refining of current ones, the study significantly improve Ethereum's scalability while adhering to its fundamental ideals of decentralisation and security. This research aims to address the scalability bottlenecks of current DeFi platforms while also laying the groundwork for Ethereum to evolve into a robust, high-performance infrastructure capable of powering the next wave of decentralised finance innovation.