Regulating the electronic structure of CoP nanoflowers by molybdenum incorporation for enhanced lithium and sodium storage

Hierarchical Co1.4Ni0.6P@C hollow nanoflowers assembled from ultrathin nanosheets as an anode material for high-performance lithium-ion batteries

“…2a S7d and S7e †). 18,29,30,[34][35][36] The Raman spectra of Co 1.4 Ni 0.6 P@C HNFs was acquired, as shown in Fig. 2b.…”

“…Very recently, an effective way to achieve excellent performance at high current densities is to focus on composition engineering, where the properties are regulated by synthesizing bimetallic phosphides with different proportions of two metals. Tao et al 29 developed a novel self-template conversion method, in which MOF-Co nanosheets prepared by mixing Co ions and 2-methylimidazole were added to different amounts of (NH 4 ) 2 MoO 4 solution to synthesize a series of bimetallic Co 1− x Mo x P nanocrystals embedded in a nitrogen-doped carbon (NC) matrix by phosphating. In particular, Co 0.7 Mo 0.3 P/NC exhibits superior lithium-storage performance (373 mA h g −1 at 5.0 A g −1 ) and excellent sodium-storage performance (175 mA h g −1 at 5.0 A g −1 ).…”

Rational construction of yolk–shell CoP/N,P co-doped mesoporous carbon nanowires as anodes for ultralong cycle life sodium-ion batteries

“…Fig. 4(a) shows CV curves of the YS–CoP@NPC nanocomposites for the first five cycles at a scan rate of 0.1 mV s −1 between 0.01 and 3.0 V. In the 1st cathodic scan, the well-defined current peaks were observed at ∼0.73 V, which is attributed to the irreversible decomposition of the electrolyte to form a SEI film and the reaction of CoP + Na + + e − → Na 3 P + Co. 28,41 In the first anodic process, a broad peak around ∼2.0 V mainly caused by the decomposition of Na 3 P, which correspond to the main reaction of Na 3 P + Co → CoP + 3Na + + 3e − . 30 Compared to the CV curves of CoP shown in Fig.…”

“…To overcome above issues, various strategies like rational nanostructure design, hybridized with carbon-based materials and metallic element doping have been explored. For example, Tao and co-workers 28 prepared Co 1− x Mo x P/NC as anodes for SIBs, and exhibited an extraordinary discharge capacity of 160 mA h g −1 at 1 A g −1 over 1000 cycles. Jia et al 29 synthesized CoP@nitrogen-doped porous carbon as an anode, which displayed a specific capacity of 230 mA h g −1 after 370 cycles at 0.2 A g −1 .…”

Constructing layered double hydroxide derived heterogeneous Ti3C2Tx@S–MCoP (M = Ni, Mn, Zn) with S-vacancies to boost sodium storage performance

“…7 However, the poor conductivity and electrochemical reactivity of conventional LDHs limit their application in SIBs. To solve these problems, LDH materials can be transformed into the corresponding bimetallic transition metal phosphides (TMPs) by a phosphorization process, such as NiCoP, 8 Ni 2.3 FeP 3.4 , 9 Co 0.7 Mo 0.3 P, 10 CoP/FeP 11 and Ni 1.5 Co 0.5 P x , 12 which have been regarded as promising candidate anode materials for SIBs due to their high specific capacities and safe operating potential. Notably, bimetallic TMPs exhibit higher specific capacity compared with monometallic TMPs due to their richer redox active sites and higher electrical conductivity.…”