A 3D Hierarchical Host with Enhanced Sodiophilicity Enabling Anode‐Free Sodium‐Metal Batteries

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202109767. 10 mAh cm -2 in Na//Cu asymmetric cells, as well as over 14 400 cycles at 60 mA cm -2 in Na//Na symmetric cells. Density functional theory calculations reveal that the superior cycling performance of PC-CFe stems from the stronger adsorption of Na on the surface of the CFe, providing initial nucleation sites more favorable to Na deposition. Moreover, the full cell with a PC-CFe host without Na metal and a high-loading Na 3 V 2 (PO 4 ) 3 cathode (10 mg cm -2 ) maintains a high capacity of 103 mAh g -1 at 1 mA cm -2 even after 100 cycles, demonstrating the operation of anode-free SMBs.

Codoped porous carbon nanofibres as a potassium metal host for nonaqueous K-ion batteries

“…Indeed, in these systems (although not experimentally tested in the present manuscript), an MSCNF host would require large amounts of electrolyte, thus possibly decreasing the energy density of the cell. Accordingly, potential strategies that may reduce the requirements of electrolytes in an MSCNF-based battery would be (1) preparing thinner MSCNFs (<50 μm) via a proper electrospinning method to reduce the requirement of electrolyte 73 , (2) pretreating the MSCNFs (controlled K deposition), partially lowering their surface area and suppressing interfacial side reactions with the electrolyte 74 . While the material design presented here represents a valid proof-of-concept for the production and application of carbon-based alkali metal hosting matrices, these findings also demonstrate the effectiveness of pore structure engineering in developing practical K metal batteries.…”

A simple and effective host for sodium metal anode: a 3D-printed high pyrrolic-N doped graphene microlattice aerogel

“…31–35 Nevertheless, most studies exhibited randomly distributed channels and unadjustable pore structure, which may lead to slow ion transfer kinetics and the formation of Na void space. 36 The inherent problems of Na dendrites, e.g. , uneven Na + flux, has not been fully addressed.…”

A sodiophilic VN interlayer stabilizing a Na metal anode

“…To enhance the cycling performance, researchers have designed sodiophilic seed materials without the occurrence of alloying–dealloying reaction during the Na plating/stripping process. 30 For example, Xie et al designed well-dispersed Co nanoparticles encapsulated in porous nitrogen-doped carbon rhombic dodecahedra to regulate Na nucleation and deposition. 31 Wang's group constructed sodiophilic nitrogen (N) and sulfur (S) co-doped carbon nanotube (NSCNT) paper to adjust the initial Na nucleation, displaying dendrite-free and flat morphology during the reiterative Na stripping and plating processes, resulting in outstanding cycling stability.…”