Publications by authors named "Changxing Han"
Traditional lithium salts are difficult to meet practical application demand of lithium metal batteries (LMBs) under high voltages and temperatures. LiPF, as the most commonly used lithium salt, still suffers from notorious moisture sensitivity and inferior thermal stability under those conditions. Here, we synthesize a lithium salt of lithium perfluoropinacolatoborate (LiFPB) comprising highly-fluorinated and borate functional groups to address the above issues.
View Article and Find Full Text PDFSelf-Standing Single-Ion Borate Salt-Based Polymer Electrolyte for Lithium Metal Batteries.
ACS Appl Mater Interfaces
September 2024
Polymer electrolytes (PEs) with excellent flexibility and superior compatibility toward lithium (Li) metal anodes have been deemed as one of the most promising alternatives to liquid electrolytes. However, conventional lithium bis(trifluoromethanesulfonyl)imide (LiTFSI)-based dual-ion PEs suffer from a low Li ion transference number and notorious Li dendrite growth. Here, a single-ion conducting polyborate salt without any fluorinated groups, polymeric lithium dihydroxyterephthalic acid borate (PLDPB), is presented for addressing the issues of Li metal batteries.
View Article and Find Full Text PDFArticle Synopsis
- Lithium difluoro(oxalato) borate (LiDFOB) is a popular choice for lithium-ion batteries due to its thermal stability and aluminum protection, but it often decomposes and produces harmful gases like CO.
- A new lithium borate salt, lithium difluoro(1,2-dihydroxyethane-1,1,2,2-tetracarbonitrile) borate (LiDFTCB), has been created to improve resistance to oxidation and reduce gas production.
- Using LiDFTCB as an electrolyte significantly enhances the battery performance, allowing for better capacity retention over many cycles while forming strong protective layers at the electrodes, highlighting the benefits of cyano-functionalized anions for