Details

Autor(en) / Beteiligte

• He, Yan
• Wang, Libo
• Wang, Xiaolong
• Shen, Changjie
• Hu, Qianku
• Zhou, Aiguo
• Liu, Xuqing

Titel

Surface reformation of 2D MXene by in situ LaF3-decorated and enhancement of energy storage in lithium-ion batteries

Ist Teil von

• Journal of materials science. Materials in electronics, 2020-05, Vol.31 (9), p.6735-6743

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The two-dimensional transition metal carbides or nitrides Ti 3 C 2 T x (MXene), has emerged as attractive electrode materials for lithium-ion batteries due to their metallic electrical conductivity and low ion diffusion barrier. However, the stabilities, electronic structures and other physicochemical properties of MXene are affected intensively by their surface species and structure. Here, a new architecture approach is demonstrated for reforming MXene through in situ-decorated LaF 3, for boosting the performance of Li batteries in terms of capacity and rate ability. Ti 3 C 2 T x @LaF 3 can deliver an initial specific discharge capacity of 340 mAh/g under a current density of 50 mA/g and a reversible discharge capacity of 89.2 mAh/g at a current density of 1000 mA/g, which is significantly higher than that of pure Ti 3 C 2 T x . Ti 3 C 2 T x @LaF 3 heterostructures enhance Li‐ion storage performance by shortens the charge transfer distance and improves the charge transfer rate during electrochemical reaction.