Multi-heteroatom-Doped Carbon Matrix and N-Doped Carbon Shell Double Protection Enabled Superb Stability of Nickel Diselenide for Lithium Storage

Abstract

The ever-growing demand for portable energy storage devices with desired performance has made lithium-ion batteries (LIBs) one of the most attractive research topics. Herein, NiSe 2 with double protection from a multi-heteroatom doped carbon matrix and N-doped carbon shell (NiSe 2 @NC/rGO) is investigated as an anode for lithium-ion storage and shows excellent electrochemical properties, especially cycling stability. The multi-heteroatom doped carbon matrix and an extra N-doped carbon shell in the NiSe 2 @NC/rGO composite enable a promoted rate capacity and cycling performance via improving its electronic/ionic conductivity and buffering the volume expansion during the lithiation/deithiation reactions. With this strategy, the NiSe 2 @NC/rGO electrode shows almost no capacity decay after 2000 cycles at 1 A g −1 . It also shows superior rate performance by exhibiting 222.3 mAh g −1 even at the high current density of 10 A g −1 .

Novel Ni–Ge–P anodes for lithium-ion batteries with enhanced reversibility and reduced redox potential

“…S18, † the rate performance of Ni-Ge-P 2 /C in this work is superior to those of previously reported Ni-, Ge-, and P-based anodes, and the capacity and cycling performance of Ni-Ge-P 2 /C are both better than those of reported NiP 2 @C, Ni 2 P@rGO and Cu 2 Ge 8 -based anodes. [47][48][49][50][51]…”

Flexible electrode of Fe-doped NiSe2@porous graphene as binder-free anode for lithium-ion batteries

“…However, the current specific capacity of graphite is basically close to its theoretical limit, which can hardly meet the increasing requirement of various energy storage devices. 5 Transition metal selenides (TMSes) such as FeSe 2 , 6,7 CoSe 2 , 8,9 NiSe 2 , 10–12 and Cu 2 Se 13 have become outstanding anode candidates due to their characteristic physical and chemical properties, such as large interlayer distances, high theoretical specific capacities, low cost, and eco-friendliness. 14–16 In addition, their weak metal-Se covalent bonds are convenient for the intercalation and deintercalation of lithium ions.…”

“…10,18 Among TMSes, NiSe 2 is regarded as a promising anode material for LIBs due to its rich oxidation states and relatively low resistivity. 12 However, on the one hand, the volume expansion during charging/discharging may lead to structural collapse and peeling of electrodes. On the other hand, the electrical conductivity of NiSe 2 is insufficient, although it is better than that of other transition-metal chalcogenides.…”

“…which showed high specic capacities and rate performance 23. Sun et al designed a NiSe 2 /multiheteroatom-doped carbon/reduced graphene oxide composite by one-step selenization of Ni-MOF/graphene oxide, which exhibited excellent electrochemical properties, especially cycling stability 12. …”

Pliable electrode of porous graphene-encapsulated FeNiSe4 binary-metal selenide nanorods as a binder-free anode for lithium-ion batteries

“…18 Sun et al prepared NiSe 2 /multi-heteroatom doped carbon/reduced graphene oxide, which exhibited excellent electrochemical properties, especially cycling stability. 21…”