The ability to recharge and to deliver high capacity quickly is required for the next generation of lithium ion storage technologies, especially for pure electric vehicles. A new type of hybrid positive electrode for lithium ion capacitors is investigated that comprises discrete layers of high power capacitive activated carbon and high capacity insertion-type LiFePO₄, with the aim of boosting energy density towards that of a lithium ion battery while preserving capacitor-like power capability over thousands of charge/discharge cycles. The electrochemical performance of these hybrid electrodes was investigated both as a function of the LiFePO₄ weight fraction (its thickness in the multi-layered electrode arrangement) and its location within the multi-layer. The best performing hybrid positive electrode architecture delivered an attractive balance of an energy density of ~ 90 Wh/kg and a power density of ~ 15 kW/kg in a full lithium ion capacitor configuration, which outperformed other combinations of the same materials. The ability to produce a double-sided configuration of the hybrid layered electrode over 20 × 20 cm² was demonstrated, confirming the potential scalability of layer-by-layer manufacture.

下一代锂离子存储技术，尤其是纯电动汽车，需要具备充电和快速输送高容量的能力。研究了一种新型的锂离子电容器混合正极，该电极包括高功率电容活性炭和高容量插入式LiFePO _4的不连续层，目的是在保持电容器结构的同时，将能量密度提高到锂离子电池的能量密度。例如在数千个充电/放电循环中的功率能力。研究了这些混合电极的电化学性能与LiFePO _4的关系重量分数（在多层电极排列中的厚度）及其在多层中的位置。在全锂离子电容器配置中，性能最佳的混合正极体系结构在约90 Wh / kg的能量密度和约15 kW / kg的功率密度之间实现了引人注目的平衡，其性能优于相同材料的其他组合。证明了能够在20×20 cm ²上产生混合层状电极的双面结构的能力，从而证实了逐层制造的潜在可扩展性。