TY - JOUR
T1 - Metal–Organic Framework with Dual Excitation Pathways as Efficient Bifunctional Catalyst for Photo-assisted Li–O2 Batteries
AU - Tao, Yinglei
AU - Fan, Xiaoli
AU - Yu, Xingyu
AU - Gong, Ke
AU - Xia, Yujiao
AU - Gong, Hao
AU - Chen, Haixia
AU - Huang, Xianli
AU - Zhang, Aidi
AU - Wang, Tao
AU - He, Jianping
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024/11/14
Y1 - 2024/11/14
N2 - Li–O2 batteries (LOBs) have sparked significant interest due to their fascinating high theoretical energy density. However, the large overpotential for the formation and oxidation of Li2O2 during charge and discharge process seriously hinders the further development and application of LOBs. In this work, metal–organic frameworks (MOFs) with different metal clusters (Fe, Ti, Zr) are successfully synthesized, and they are employed as the photoelectrodes for the photo-assisted LOBs. The special dual excitation pathways of Fe-MOF under illumination and the superior separation efficiency of photocarriers, which significantly enhance the activation of O2/Li2O2, improving the catalytic activity of oxygen reduction reaction and oxygen evolution reaction. Moreover, compared to traditional inorganic semiconductor crystals, Fe-MOF exhibits large specific surface area and excellent O2 adsorption ability. Therefore, the LOB with Fe-MOF as the cathode exhibits large specific capacity, ultralow charge/discharge overpotential of 0.22 V at 0.05 mA cm−2 and excellent stability of 195 cycles under illumination. This study provides an environmentally friendly and highly efficient photocatalyst for LOBs, and a new strategy for designing photoelectrodes.
AB - Li–O2 batteries (LOBs) have sparked significant interest due to their fascinating high theoretical energy density. However, the large overpotential for the formation and oxidation of Li2O2 during charge and discharge process seriously hinders the further development and application of LOBs. In this work, metal–organic frameworks (MOFs) with different metal clusters (Fe, Ti, Zr) are successfully synthesized, and they are employed as the photoelectrodes for the photo-assisted LOBs. The special dual excitation pathways of Fe-MOF under illumination and the superior separation efficiency of photocarriers, which significantly enhance the activation of O2/Li2O2, improving the catalytic activity of oxygen reduction reaction and oxygen evolution reaction. Moreover, compared to traditional inorganic semiconductor crystals, Fe-MOF exhibits large specific surface area and excellent O2 adsorption ability. Therefore, the LOB with Fe-MOF as the cathode exhibits large specific capacity, ultralow charge/discharge overpotential of 0.22 V at 0.05 mA cm−2 and excellent stability of 195 cycles under illumination. This study provides an environmentally friendly and highly efficient photocatalyst for LOBs, and a new strategy for designing photoelectrodes.
KW - MOFs
KW - O adsorption ability
KW - different metal clusters
KW - dual excitation pathways
KW - photo-assisted Li–O batteries
UR - http://www.scopus.com/inward/record.url?scp=85200575892&partnerID=8YFLogxK
U2 - 10.1002/smll.202403683
DO - 10.1002/smll.202403683
M3 - 文章
C2 - 39109560
AN - SCOPUS:85200575892
SN - 1613-6810
VL - 20
JO - Small
JF - Small
IS - 46
M1 - 2403683
ER -