CoZn Nanoparticles@Hollow Carbon Tubes Enabled High-Performance Potassium Metal Batteries

Abstract

Potassium-metal batteries (PMBs) are attractive candidates for low-cost and large-scale energy storage systems due to the abundance of potassium. However, its application is hampered by large volume change and serious dendrite growth. Herein, a CoZn semicoherent structure nanoparticle-embedded nitrogen-doped hollow carbon tube (CoZn@HCT) electrode is prepared via coaxial electrospinning. Due to the high potassiophilic CoZn semicoherent structure nanoparticles and large potassium metal storage space, the free-standing CoZn@HCT host for K metal exhibits uniform K nucleation and stable plating/stripping (stable cycling 1000 h at 1 mA cm–2 with 1 mA h cm–2). Furthermore, enhanced electrochemical performance with good cycling stability and rate capability is achieved in (CoZn@HCT@K||PTCDA) full batteries. Our results highlight a promising strategy for dendrite-free K metal anodes and high-performance PMBs.

Wide-temperature-range sodium-metal batteries: from fundamentals and obstacles to optimization

“…A high CE (98.53%) was obtained, indicating that the 1D hollow NCT design is conducive to enhancing the stability of SMBs. 316,319 Besides, constructing highly active groups on a 1D carbon structures surface can effectively induce sodium deposition. 316,320 As seen in Fig.…”

Electrospun carbon-based nanomaterials for next-generation potassium batteries

“…Similarly, CoZn NPs embedded in hollow carbon tubes were also fabricated to enable uniform K nucleation and stable K plating/stripping. 169…”

Electrospun advanced nanomaterials for in situ transmission electron microscopy: Progress and perspectives

“…Except for alkali-metal-ion batteries, rechargeable alkalimetal batteries hold great promise for next-generation energy storage due to their high energy densities. [112][113][114][115] Li metal is an ideal anode material; however, the uncontrollable growth of Li dendrites not only causes serious side reactions but leads to potential safety hazards. To guide better alkali metal deposition, it is necessary to have an in-depth understanding of their deposition/ dissolution behavior.…”