Stabilizing Na metal anode with NaF interface on spent cathode carbon from aluminum electrolysis
Yangyang Xie, Junxian Hu, Liuyun Zhang, Aonan Wang, Jingqiang Zheng, Huangxu Li, Yanqing Lai, Zhian Zhang
Abstract
We report the synthesis of spent cathode carbon (SCC) with a NaF interface from aluminum electrolysis, and its application as a Na metal anode host. The SCC anode exhibits superior ion conductivity and a high shear modulus. The natural NaF interface on the SCC anode can regulate Na+ transmission and inhibit dendrite growth. Furthermore, the anode can be used to turn waste into treasure through directly using spent cathodic carbon without any chemical processing. The green SCC electrode exhibits a higher flat voltage and better reversibility compared with purified cathode carbon without NaF.
Topics & Concepts
AnodeCathodeElectrolysisCarbon fibersMaterials scienceAluminiumMetalMetallurgyChemical engineeringInorganic chemistryChemistryElectrodeComposite numberComposite materialElectrolytePhysical chemistryEngineeringAdvanced Battery Materials and TechnologiesAdvancements in Battery MaterialsLayered Double Hydroxides Synthesis and Applications