Cr0.5Nb24.5O62 Nanowires with High Electronic Conductivity for High-Rate and Long-Life Lithium-Ion Storage Chao Yang,†,‡ Shu Yu,∥ Chunfu Lin,*,† Fan Lv,‡ Shunqing Wu,∥ Yong Yang,‡ Wei Wang,‡ Zi-Zhong Zhu,∥ Jianbao Li,† Ning Wang,† and Shaojun Guo*,‡,§,⊥ †
State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China ‡ Department of Materials Science and Engineering, §BIC-ESAT, and ⊥Key Lab of Theory and Technology for Advanced Battery Materials, College of Engineering, Peking University, Beijing 100871, China ∥ Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, China S Supporting Information *
ABSTRACT: Intercalation-type TiNbxO2+2.5x (x = 2, 5, and 24) anode materials have recently become more interesting for lithium-ion batteries (LIBs) due to their large theoretical capacities of 388−402 mAh g−1. However, the Ti4+/Nb5+ ions in TiNbxO2+2.5x with empty 3d/4d orbitals usually lead to extremely low electronic conductivity of
