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 ultra‐high 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−1 at 1 A g−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−1 at 0.1 A g−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.

Designing Glass Nanocomposites with Nonbridging Oxygen Defects: An Approach to Improve Sodium-Ion Conduction

“…Energy storage devices using electrochemical-based systems like solid-state batteries (SSB) are the effective solutions to address uninterrupted and eco-friendly global energy demand. The simplified design of SSB, unlike traditional liquid-organic electrolytes, offers excellent ionic mobility and good machinability without any safety issues. , In this facet, remarkably successful research output was solid-state lithium-ion batteries (SSLIB), which possess benefits of high energy and power densities for portable commercial electronic devices. − Nevertheless, shortcomings like limited lithium resources and uneven geographical distributions impede their accessibility toward a wide range of applications. − Therefore, solid-state sodium-ion batteries (SSNIB) are in vogue as a promising successor to SSLIBs with benefits of abundant sodium resources and electrochemical features akin to lithium. By far, ZEBRA (zero-emission battery research activities) cells (Na-NiCl 2 ) and sodium sulfur (Na-S) cells are formerly commercial NIB systems with operability at a high temperature around 573 K. , The good sodium ionic conductivity (in a 2D plane) of the layered structure of β-alumina (NaAl 11 O 17 ) has created an unprecedented interest for both the fields of solid-state ionic and NIB systems .…”