TY - JOUR
T1 - 1D hybrid consisting of LiTi2(PO4)3 with highly-active (1 1 3) crystal facets and carbon nanotubes
T2 - A bidirectional catalyst for advanced lithium-sulfur batteries
AU - Qian, Mao
AU - Tang, Yakun
AU - Liu, Lang
AU - Zhang, Yue
AU - Li, Xiaohui
AU - Chen, Jia Jia
AU - Fang, Chendong
AU - Lei, Yaojie
AU - Wang, Guoxiu
N1 - Publisher Copyright:
© 2025
PY - 2025/1/18
Y1 - 2025/1/18
N2 - The slow conversion kinetics and shuttle effect of lithium polysulfides (LiPSs) significantly undermine the practical viability of lithium-sulfur (Li-S) batteries. Herein, we rationally develop a bidirectional catalyst consisting of the NASICON-type polyanionic phosphate of LiTi2(PO4)3 nanoparticles semi-embedded on carbon nanotubes (LiTi2(PO4)3/CNTs) toward these challenges. The amorphous carbon can not only regulate the particle size of LiTi2(PO4)3 nanoparticles but also promote its isotropic growth, facilitating the transformation of LiTi2(PO4)3 facets from the thermodynamically more stable (1 0 4) to the highly active (1 1 3). A special hybrid interface of LiTi2(PO4)3 (1 1 3)-C is prepared to enable strong electronic donation from carbon to Ti atoms, which effectively regulates the metal Ti d band center, promotes the d-p orbital hybridization of LiTi2(PO4)3/CNTs and significantly boosts its the catalytic ability for LiPSs. In-situ tests and theoretical calculations indicate that LiTi2(PO4)3/CNTs enhance the adsorption-catalytic ability of LiPSs and reduce the energy barrier of liquid LiPSs to solid Li2S, thus exhibiting superior electrochemical activity to actuate the translation from intermediates to discharge products. Thanks to the excellent catalytic ability and unique ion characteristics, the LTPC//LTPC@PEP//Li cell shows an impressive rate performance and reversible capability of 818 mAh/g after 300th cycles at 4C.
AB - The slow conversion kinetics and shuttle effect of lithium polysulfides (LiPSs) significantly undermine the practical viability of lithium-sulfur (Li-S) batteries. Herein, we rationally develop a bidirectional catalyst consisting of the NASICON-type polyanionic phosphate of LiTi2(PO4)3 nanoparticles semi-embedded on carbon nanotubes (LiTi2(PO4)3/CNTs) toward these challenges. The amorphous carbon can not only regulate the particle size of LiTi2(PO4)3 nanoparticles but also promote its isotropic growth, facilitating the transformation of LiTi2(PO4)3 facets from the thermodynamically more stable (1 0 4) to the highly active (1 1 3). A special hybrid interface of LiTi2(PO4)3 (1 1 3)-C is prepared to enable strong electronic donation from carbon to Ti atoms, which effectively regulates the metal Ti d band center, promotes the d-p orbital hybridization of LiTi2(PO4)3/CNTs and significantly boosts its the catalytic ability for LiPSs. In-situ tests and theoretical calculations indicate that LiTi2(PO4)3/CNTs enhance the adsorption-catalytic ability of LiPSs and reduce the energy barrier of liquid LiPSs to solid Li2S, thus exhibiting superior electrochemical activity to actuate the translation from intermediates to discharge products. Thanks to the excellent catalytic ability and unique ion characteristics, the LTPC//LTPC@PEP//Li cell shows an impressive rate performance and reversible capability of 818 mAh/g after 300th cycles at 4C.
KW - Bidirectional catalysis
KW - High active LiTi2(PO4)3 (1 1 3)-C
KW - Hybrid interface
KW - Lithium-sulfur batteries
KW - NASICON-type polyanionic phosphate
UR - https://www.scopus.com/pages/publications/85215836388
U2 - 10.1016/j.cej.2025.159727
DO - 10.1016/j.cej.2025.159727
M3 - Article
AN - SCOPUS:85215836388
SN - 1385-8947
VL - 505
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 159727
ER -