Realizing complete solid-solution reaction to achieve temperature independent LiFePO 4 for high rate and low temperature Li-ion batteries

Open AccessCCS ChemistryRESEARCH ARTICLE24 Jan 2022Realizing complete solid-solution reaction to achieve temperature independent LiFePO4 for high rate and low temperature Li-ion batteries Bingqiu Liu, Qi Zhang, Yiqian Li, Yuehan Hao, Usman Ali, Lu Li, Lingyu Zhang, Chungang Wang and Zhongmin Su Bingqiu Liu Google Scholar More articles by this author , Qi Zhang Google Scholar More articles by this author , Yiqian Li Google Scholar More articles by this author , Yuehan Hao Google Scholar More articles by this author , Usman Ali Google Scholar More articles by this author , Lu Li Google Scholar More articles by this author , Lingyu Zhang Google Scholar More articles by this author , Chungang Wang Google Scholar More articles by this author and Zhongmin Su Google Scholar More articles by this author https://doi.org/10.31635/ccschem.022.202101776 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail LiFePO4 (LFP) is hard to deliver satisfied capacity for high rate and low temperature application due to the low Li+ diffusivity, which greatly limits its application. Solid solution reaction, compared with traditional two-phase transition, needs less energy and the lithium ion diffusivity is also higher, which becomes a possibility to break the barrier of LFP. However, solid solution reaction in LFP can only occur at high rates due to the lattice stress caused by bulk elastic modulus. Herein, pomegranate-like [email protected] nanoclusters with ultrafine [email protected] subunits (8 nm) (PNCsLFP) were synthesized. By in-situ XRD, the PNCsLFP can achieve complete solid-solution reaction at relative low rate of 0.1C which breaks the limitation of low lithium ion diffusivity of traditional LFP and makes the lithium ion diffusivity free from temperature, leading to almost the same lithium ion diffusivities at room temperature, 0 °C, −20 °C and −40 °C. The complete solid-solution reaction at all rates breaks the shackles of limited lithium ion diffusivity on LFP and offers a promising solution for next generation LIBs with high rate and low temperature application. Download figure Download PowerPoint Previous articleNext article FiguresReferencesRelatedDetails Issue AssignmentNot Yet AssignedSupporting Information Copyright & Permissions© 2022 Chinese Chemical Society Downloaded 85 times PDF DownloadLoading ...