Template-Sacrificing Synthesis of Ni-Co Layered Double Hydroxides Polyhedron as Advanced Anode for Lithium Ions Battery

Abstract

The novel hollowed Ni-Co layered double hydroxide polyhedron (H-(Ni, Co)-LDHP) is synthesized via a template-sacrificing approach using ZIF-67 as template. The morphology, crystallinity, porous texture, and chemical state of H-(Ni, Co)-LDHP are examined. It demonstrates that the H-(Ni, Co)-LDHP not only provides rich redox sites but also promotes the kinetics due to presence of numerous rational channels. As a result, the H-(Ni, Co)-LDHP manifests the desirable lithium ions storage performance when employed as anode. This study paves a new way for preparing hollowed nanostructure toward advanced electrochemical applications.

Constructing P-doped self-assembled V2C MXene/NiCo-layered double hydroxide hybrids toward advanced lithium storage

“…What is more important, as comparatively exhibited in Fig. 3(d), is that the rate performance of the P-V 2 C/NiCo-LDH electrode obtained here is superior to other V 2 C-and NiCo-LDH-based anodes previously reported, 39,55,[58][59][60][69][70][71][72] especially at large current density. When the current density is 1000 mA g À1 , the discharge specific capacities of materials, such as CoNi-LDH/GO (710.2 mA h g À1 ), 55 Co 3 V 2 O 8 @-NiCo-LDH (689 mA h g À1 ), 60 V 2 C@Co (535 mA h g À1 ), 39 and V 2 O 5 @VO 2 @V 2 C@VC (382 mA h g À1 ) 70 shown in Fig.…”

“…61 The TEM images depicted in Fig. 2 (015) and (009) planes of NiCo-LDH, 59,64,65 respectively, confirming the formation of NiCo-LDH on the V 2 C surface. The EDS results in Fig.…”

NiFe-LDH/MXene nano-array hybrid architecture for exceptional capacitive lithium storage

“…5d and S6c,† the specific capacities were estimated as 587.1, 540.2, 448.0, 326.3, 282.2, 239.4, 248.3, and 682.8 mA h g −1 for NiFe-LDH/MXene-500 electrodes, which were much larger than those of MXene, NiFe-LDH, NiFe-LDH/MXene-50, and NiFe-LDH/MXene-200. As summarized in Table S2,† NiFe-LDH/MXene-500 indicated an appealing rate capability, which was superior to many other LDH-based anodes reported previously, such as Ni x Co 2 x (OH) 6 x @eRG, 52 Si@NiAl-LDH, 18 and H-(Ni,Co)-LDHP 53 (Fig. S6d†).…”

“…S4d †). S2, † NiFe-LDH/MXene-500 indicated an appealing rate capability, which was superior to many other LDHbased anodes reported previously, such as Ni x Co 2x (OH) 6 x@eRG, 52 Si@NiAl-LDH, 18 and H-(Ni,Co)-LDHP 53 (Fig. S6d †).…”

Hollow CoS/C Structures for High-Performance Li, Na, K Ion Batteries

“…In order to meet the large-scale application of high-performance alkaline ion batteries, it is necessary to design the structure of cobalt sulfide to avoid the structural damage in the cycle process. As an excellent precursor for constructing nanostructures and hollow structures, zeolitic imidazolate framework (ZIF-67) has adjustable physical and chemical properties and large specific surface area ( Wang et al, 2016 ; Zhao et al, 2017 ; Lu et al, 2020 ; Yi et al, 2020 ). ZIF-derived cobalt sulfide hollow structure can effectively alleviate the structural damage caused by stress.…”