The undesirable interactions between the charge carriers (Li + ) and various objects in the special microenvironment of batteries would cause uneven lithium (Li) metal deposition behavior, which severely impedes the application of Li metal batteries (LMBs). In recent years, many works focus on optimizing these interactions by functional molecules/ions modification. Nevertheless, related reviews are still absent. Here, this review introduces the regulation methods of Li metal deposition from molecular/ionic designs, which is a new perspective including Li + flux homogenization, the de-solvation process regulation, optimizing the solid electrolyte interphase (SEI) in conventional solvation structure and anion-rich solvation structure. Also, the general design principles are studied in each mechanism and some suggestions are proposed in the prospective future directions, aiming to guide the development of molecular/ionic designs and the actual application of LMBs with high energy densities.
Microsupercapacitors have picked up a remarkable reputation as prospective micropower sources for compact electronics. Unfortunately, the fabricating complexity of electrode structures and preparing sophistication of electrode materials have prevented their practical deployment. Herein, a one‐step low‐temperature precipitation method is applied to straightforwardly self‐assemble porous Ni(OH)2 nanosheets on the surface of carbon nanotubes (CNTs) surface beneath electrostatic interaction. The developed core–shell 1D CNTs@Ni(OH)2 nanosheets nanostructures exhibit high electron and ion conductivity, a sign of excellent energy storage capability. In this vein, a thermally assisted 3D printing process is intelligently regulated to enable the fabrication of 3D interdigital electrodes from as‐obtained materials. The ultimate solid‐state microsupercapacitors of CNTs@Ni(OH)2 nanosheets core–shell nanostructures in this way exhibit excellent cycle stability and offer an exceptional areal capacitance of 39.6 mF cm−2, approximately a size of or two higher than that of C‐based partners. A strong foundation for high‐quality microsupercapacitors is laid by the high specific capacity of CNTs@Ni(OH)2 nanosheets core–shell nanostructures and the ability to fabricate 3D interdigital electrodes using a thermally assisted 3D printing process.
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