Lyotropic Liquid Crystalline Mesophases Made of Salt-Acid-Surfactant Systems for the Synthesis of Novel Mesoporous Lithium Metal Phosphatesopen access
- Authors
- Uzunok, Isil; Kim, Jeonghun; Colak, Tuluhan O.; Kim, Dae Sik; Kim, Hansu; Kim, Minjun; Yamauchi, Yusuke; Dag, Omer
- Issue Date
- Oct-2019
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- electrochemical energy storage; lithium ion batteries; lithium metal phosphates; lyotropic liquid crystals; mesoporous
- Citation
- CHEMPLUSCHEM, v.84, no.10, pp 1544 - 1553
- Pages
- 10
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- CHEMPLUSCHEM
- Volume
- 84
- Number
- 10
- Start Page
- 1544
- End Page
- 1553
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2130
- DOI
- 10.1002/cplu.201900435
- ISSN
- 2192-6506
2192-6506
- Abstract
- Mesoporous lithium metal phosphates are an important class of materials for the development of lithium ion batteries. However, there is a limited success in producing mesoporous lithium metal phosphates in the literature. Here, a lyotropic liquid crystalline (LLC) templating method was employed to synthesize the first examples of LiMPO4 (LMP) of Mn(II), Co(II), and Ni(II). A homogeneous aqueous solution of lithium and transition metal nitrate salts, phosphoric acid (PA), and surfactant (P123) can be spin coated or drop-cast coated over glass slides to form the LLC mesophases which can be calcined into mesoporous amorphous LMPs (MA-LMPs). The metal salts of Mn(II), Co(II) and Ni(II) produce MA-LMPs that crystallize into olivine structures by heat treatment of the LLC mesophase. The Fe(II) compound undergoes air oxidation. Therefore, both Fe(II) and Fe(III) precursors produce a crystalline Li3Fe2(PO4)3 phase at over 400 °C. The MA-LMPs show no reactivity towards lithium, however the crystalline iron compound exhibits electrochemical reactivity with lithium and a good electrochemical energy storage ability using a lithium-ion battery test.
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