Efficient Stabilization of Na Storage Reversibility by Ti Integration into O′3-Type NaMnO_(2)

作     者：Takuro Sato Kazuki Yoshikawa Wenwen Zhao Tokio Kobayashi Hongahally Basappa Rajendra Masao Yonemura Naoaki Yabuuchi 

作者机构：Department of Chemistry and Life ScienceYokohama National University79-5 TokiwadaiHodogaya-kuYokohamaKanagawa 240-8501Japan Department of Applied ChemistryTokyo Denki UniversityAdachiTokyo 120-8551Japan Elements Strategy Initiative for Catalysts and BatteriesKyoto Universityf1-30 Goryo-OharaNishikyo-kuKyoto 615-8245Japan Institute of Materials Structure ScienceHigh Energy Accelerator Research OrganizationTsukubaIbaraki 305-0801Japan Department of Materials Structure ScienceSokendai(The Graduate University for Advanced Studies)203-1 ShirakataTokaiIbaraki 319-1106Japan Advanced Chemical Energy Research CenterYokohama National University79-5 TokiwadaiHodogaya-kuYokohamaKanagawa 240-8501Japan 

出 版 物：《Energy Material Advances》 (能源材料前沿（英文）)

年 卷 期：2021年第2021卷第1期

页      面：143-154页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the partial support from Japan Society for the Promotion of Science(JSPS),Grant-in-Aid for Scientific Research(Grant Numbers 15H05701,18H02076,and 19H05816) MEXT program“Elements Strategy Initiative to Form Core Research Center(JPMXP0112101003),”Ministry of Education,Culture,Sports,Science and Technology,Japan 

主　　题：electrode system Storage 

摘      要：The development of an energy storage system with abundant elements is a key challenge for a sustainable society,and the interest of Na intercalation chemistry is extending throughout the research ***,the impact of Ti integration into NaMnO2 in a binary system of x NaMnO2–(1–x)TiO2(0:5≤x≤1)is systematically examined for rechargeable Na battery *** NaMnO2,which is classified as an in-plane distorted O′3-type layered structure,delivers a large initial discharge capacity of approximately 200 mAhg-1,but insufficient capacity retention is observed,most probably associated with dissolution of Mn ions on electrochemical ***-substituted samples show highly improved electrode performance as electrode ***,the appearance of a sodium-deficient phase,Na4Mn4Ti5O18 with a tunnel-type structure,is observed for Ti-rich *** the samples in this binary system,Na0.8Mn0.8Ti0.2O2(x=0:8),which is a mixture of a partially Ti-substituted O′3-type layered oxide(Na0.88Mn0.88Ti0.12O2)and tunnel-type Na4Mn4Ti5O18 as a minor phase elucidated by Rietveld analysis on both neutron and X-ray diffraction patterns,shows good electrode performance on the basis of energy density and *** phases are electrochemically active as evidenced by in situ X-ray diffraction study,and the improvement of reversibility originates from the suppression of Mn dissolution on electrochemical *** these results,the feasibility of Mn-based electrode materials for high-energy rechargeable Na batteries made from only abundant elements is discussed in detail.