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Conductive Copper Niobate: Superior Li+‐Storage Capability and Novel Li+‐Transport Mechanism.
- Source :
-
Advanced Energy Materials . 10/17/2019, Vol. 9 Issue 39, pN.PAG-N.PAG. 1p. - Publication Year :
- 2019
-
Abstract
- Niobates with shear ReO3 crystal structures are remarkably promising anode materials for Li+ batteries due to their large capacities, inherent safety, and high cycling stability. However, they generally suffer from limited rate capabilities rooted in their insufficient electronic and Li+ conductivities. Here, micrometer‐sized copper niobate (Cu2Nb34O87) bulk as a new anode material having a high electronic conductivity of 2.1 × 10−5 S cm−1 and an impressive average Li+ diffusion coefficient of ≈3.5 × 10−13 cm2 s−1 is exploited, which synergistically leads to an excellent rate capability (184 mAh g−1 at 10 C) while remaining a large reversible capacity and superior cycling stability. Moreover, the fast Li+ transport pathways of grain boundary (micrometer scale) → lattice deformation area (nanometer scale) → (010) crystallographic plane (angstrom scale) are demonstrated in Cu2Nb34O87. Therefore, these results could pave the way for practical application of Cu2Nb34O87 in high‐performance Li+ batteries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16146832
- Volume :
- 9
- Issue :
- 39
- Database :
- Academic Search Index
- Journal :
- Advanced Energy Materials
- Publication Type :
- Academic Journal
- Accession number :
- 139189241
- Full Text :
- https://doi.org/10.1002/aenm.201902174