biostudies-literatureHao JAustralian Research Council2815-2823https://www.ebi.ac.uk/biostudies/studies/S-EPMC7022186biostudies-literatureUnknown117(6)Existing lithium-ion battery technology is struggling to meet our increasing requirements for high energy density, long lifetime, and low-cost energy storage. Here, a hybrid electrode design is developed by a straightforward reengineering of commercial electrode materials, which has revolutionized the "rocking chair" mechanism by unlocking the role of anions in the electrolyte. Our proof-of-concept hybrid LiFePO4 (LFP)/graphite electrode works with a staged deintercalation/intercalation mechanism of Li+ cations and PF6 - anions in a broadened voltage range, which was thoroughly studied by ex situ X-ray diffraction, ex situ Raman spectroscopy, and operando neutron powder diffraction. Introducing graphite into the hybrid electrode accelerates its conductivity, facilitating the rapid extractiProceedings of the National Academy of Sciences of the United States of AmericaDesigning a hybrid electrode toward high energy density with a staged Li+ and PF6 - deintercalation/intercalation mechanism.PMC7022186DP170102406Didier CLiu YPeterson VKHao JGuo ZHe HLu JZhang SLiu TPang WKYang FXia GfalseDesigning a hybrid electrode toward high energy density with a staged Li+ and PF6 - deintercalation/intercalation mechanism.Existing lithium-ion battery technology is struggling to meet our increasing requirements for high energy density, long lifetime, and low-cost energy storage. Here, a hybrid electrode design is developed by a straightforward reengineering of commercial electrode materials, which has revolutionized the "rocking chair" mechanism by unlocking the role of anions in the electrolyte. Our proof-of-concept hybrid LiFePO4 (LFP)/graphite electrode works with a staged deintercalation/intercalation mechanism of Li+ cations and PF6 - anions in a broadened voltage range, which was thoroughly studied by ex situ X-ray diffraction, ex situ Raman spectroscopy, and operando neutron powder diffraction. Introducing graphite into the hybrid electrode accelerates its conductivity, facilitating the rapid extracti2020-01-01T00:00:00Z2020 Feb2025-04-18T14:02:06.075Z2020-10-29T09:18:59ZS-EPMC70221863199647710.1073/pnas.1918442117