Nine‐Electron Transfer of Binder Synergistic π‐d Conjugated Coordination Polymers as High‐Performance Lithium Storage Materials

Abstract

To solve the problems such as the dissolution and the poor conductivity of organic small molecule electrode materials, we construct π-d conjugated coordination polymer Ni-DHBQ with multiple redox-active centers as lithium storage materials. It exhibits an ultrahigh capacity of 9-electron transfers, while the π-d conjugation and the laminar structure inside the crystal ensure fast electron transport and lithium ion diffusion, resulting in excellent rate performance (505.6 mAh g À 1 at 1 A g À 1 after 300 cycles). The interaction of Ni-DHBQ with the binder CMC synergistically inhibits its dissolution and anchors the Ni atoms, thus exhibiting excellent cycling stability (650.7 mAh g À 1 at 0.1 A g À 1 after 100 cycles). This work provides insight into the mechanism of lithium storage in π-d conjugated coordination polymers and the synergistic effect of CMC, which will contribute to the molecular design and commercial application of organic electrode materials.

Multiple Working Mechanisms Enabled by an Iodized Organic Salt Cathode for High Energy Density Potassium–Organic Batteries

“…The EVI 2 cathode shows a smaller equivalent series resistance ( R e , 3.10 Ω) and smaller semicircle associated with charge-transfer resistance ( R ct , 2744 Ω). Moreover, the straight line in low-frequency areas further shows that EVI 2 exhibits faster response kinetics, which is in keeping with the GITT analysis. , …”

“…Moreover, the straight line in low-frequency areas further shows that EVI 2 exhibits faster response kinetics, which is in keeping with the GITT analysis. 37,38 CV curves tested at various sweep rates are further analyzed in order to explore the charge storage behavior of the EVI 2 cathode (Figure S15). Apparently, the EVI 2 cathode appears to preserve a comparable shape and three distinct pairs of redox peaks even at a higher sweep rate of 1.0 mV s −1 , suggesting that the EVI 2 cathode has a high degree of reversibility of the redox reaction.…”

π-d conjugation regulates the cathode/electrolyte interface in all-solid-state lithium-ion batteries

“…The peak at 1706.6 cm −1 is due to the vibrational mode of the C]O bond, and the peaks at 3631.7 and 3346.7 cm −1 are ascribed to vibrations of the O-H bond, which is consistent with the reported literature. 40 The symmetric to asymmetric peak intensity ratio of DHBQ-LLTO increased aer the addition of LLTO in DHBQ, indicating that DHBQ and LLTO establish chemical contact. Furthermore, the diffraction patterns of DHBQ, LLTO, and DHBQ-LLTO are given in Fig.…”

Metal-ligand dual-site SAzyme with uricase-like mechanism for specific uric acid oxidation

“…Protein-based artificial enzymes still suffer from the costly to store, unstable, and sensitive to harsh physiochemical conditions. Therefore, non-protein artificial enzymes, such as emerging nanozymes [12][13][14][15][16][17][18][19][20] , clusterzymes 3,21,22 , and single-atom enzymes (SAzymes) [23][24][25][26][27][28][29] are attracting increasing interest. Among, SAzymes, which feature mononuclear metal sites and well-defined coordination structures and are skilled in simulating enzyme active centers 23,27,28,[30][31][32] .…”

“…Therefore, non-protein artificial enzymes, such as emerging nanozymes [12][13][14][15][16][17][18][19][20] , clusterzymes 3,21,22 , and single-atom enzymes (SAzymes) [23][24][25][26][27][28][29] are attracting increasing interest. Among, SAzymes, which feature mononuclear metal sites and well-defined coordination structures and are skilled in simulating enzyme active centers 23,27,28,[30][31][32] . This makes the SAzymes activity approaching or even surpassing that of natural enzymes in industrial reactions 30,33,34 .…”