Investigation of Novel Materials for Hybrid Ion Batteries

适合EPSRC能源材料和储能领域。项目概述：锂电池是一种有用的多功能储能设备，适用于广泛的应用（并且仍然是交通电气化的热门竞争者）。然而，如果要实现电力和能源的阶梯式变化，就需要替代的颠覆性技术。最近，围绕Na和k离子系统的研究得到了一致的加速，与Li相比，这些元素无处不在的性质明显有好处。该项目将开发用于混合阳离子或混合离子电池的新材料。其他关于混合离子方法的研究使用了水电解质系统，但这些电池的能量密度有限。我们建议研究混合碱（Li， Na和K）阳离子电池在一系列合成材料中的插层和转化反应，如碳与过渡金属氧化物和硫酸盐。同时，这些新型电池的电解质系统将被开发，以优化混合离子方法的兼容性。这些材料将使用粉末x射线衍射、粒度和表面积技术进行分析，并进行全面的电化学测试，以阐明其性能。表征将包括一些固态核磁共振研究（在适当的地方），以阐明混合离子体系中充放电反应的机制。因此，目标是开发一种用于混合离子电池的新型材料，并与仅锂离子相比，改进这些材料的功率方面和能量。-研究混合阳离子电池的新材料-建立并验证新电池化学成分的材料和电化学测试方法。-综合电化学测试和2电极和3电极结构阳极的事后分析-合成和表征新型混合氧化物和硫酸盐材料

Fits into EPSRC area of energy materials and energy storage. Project Overview: Lithium batteries are useful and versatile energy storage devices for a wide array of applications (and are still the favoured contender for transport electrification). However, alternative disruptive technologies are required if a step change in power and energy is to be realised. There has been a more recent concerted acceleration of the research around Na and K-ion systems, with clear benefits seen regarding the ubiquitous nature of these elements compared with Li. This project will develop novel materials for a mixed cation or hybrid-ion batteries. Other studies on mixed ion approaches have used aqueous electrolyte systems but the energy density of these batteries was limited. We propose to investigate the intercalation and conversion reactions in a range of synthesized materials, such as carbons with transition metal oxides and sulfates for mixed alkali (Li, Na and K) cation batteries. In parallel, the electrolyte systems of these novel batteries will be developed to optimise the compatibility of the hybrid ion approach. The materials will be analysed using powder x-ray diffraction, particle size and surface area techniques with comprehensive electrochemical testing to elucidate their performance. Characterisation will incorporate some solid-state NMR investigations (in-situ where appropriate) to illuminate the mechanisms of charge-discharge reactions in mixed ion systems. The aim is therefore to develop a novel materials for a hybrid-ion battery and improve upon the power aspects and energy of these materials compared to lithium ion only. Objectives: - Investigate novel materials for mixed cation batteries - Establish and validate material and electrochemical test methods for new battery chemistries. - Comprehensive electrochemical testing and post-mortem analysis of the anodes in 2 and 3 electrode configurations - Synthesise and characterise novel mixed oxide and sulphate materials