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Solid electrolyte composite Li4P2O7-Li3PO4 for lithium ion battery

Progress in Natural Science:Materials International 2020年第2期30卷 168-173页

作者： Evvy Kartini valentina yapriadi Heri Jodi Maykel Manawan Cipta Panghegar Wahyudianingsih Center for Science and Technology of Advanced Materials National Nuclear Energy Agency 2. Faculty of EngineeringLeeds University 3. Energy EngineeringJakarta State Polytechnic 4. Polytechnique Institute of Nuclear Technology

The researches on solid electrolyte have been significantly increasing due to the safety problem in lithium ion *** lithium phosphates are chosen due to environmentally *** the present study LiPOwas synthesized by solid state reaction using NHHPOand LiCOwith the ratio 1:2 at various temperatures of600 ℃,800 ℃ and 900℃.The products were characterized by x-ray diffraction,scanning electron microscopy and impedance *** x-ray diffraction showed that all samples consisted of two *** was found that the products consisted of 52.44% LiPOand 47.56% LiPO;93.56% LiPOand 6.44% LiPO;and46.27% LiPOand 53.67% LiPOunder the synthesizing temperature of 600 ℃,800℃ and 900 ℃,*** highest ionic conductivity of 3.85 ×10S/m was achieved for composite LiPO-LiPOwith the highest content of 93.56% *** conductivity is higher compared with single phase of LiPO,LiPOand *** increase in ionic conductivity may be due to the mixed anion effects related to the phosphate networks,and it also corresponds to the existence of anorthic phase LiPOwith the space group P-1(2).The crystal lattice analysis showed that the reactant LiPOconsisted of diphosphate groups *** lithium tetrahedral LiOwere linked to POgroups formed a continuous framework containing large voids,available for Li~+ ion transport,and thus it exhibited high conductivity.A composite LiPO-LiPOis a promising solid electrolyte for solid state battery.

关键词： Solid electrolyte LiPO 3 Li 3 PO4 Li 4 P 2 O 7 Ionic conductivity Lithium ion battery

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