Three to tango requires a site-specific substitution: heterotrimetallic molecular precursors for high-voltage rechargeable batteries

Abstract

A site-specific substitution within the heterobimetallic LiMn2(thd)5 molecule allows for the design of the “true” heterotrimetallic LiMnCo(thd)5 precursor.

The use of mixed-metal single source precursors for the synthesis of complex metal oxides

“…Recent progress has revealed the trimetallic SSP LiMnCo(thd)5, whose trimetallic structure can be confirmed in the gas phase by Direct Analysis in Real Time (DART) mass spectrometry, and can be used to make LiMnCoO4. 113 The Dikarev group have also recently turned their attention to Na analogues, [NaM(tbaoac)3]2, of these SSPs, targeting cathodes for Na-ion battery technologies. 114 Oxalate anions, [C2O4] 2− , have been used to form many 2D or 3D coordination networks which may incorporate secondary metals as counterions, e.g.…”

An artificially tailored functional layer on Li-rich layer cathodes enables a stable high-temperature interphase for Li-ion batteries

“…66 The sub-surface enlarged region II′ and corresponding electron diffraction pattern in LRNCM show a lattice fringe of 0.24 nm, which is indexed to the (311) plane of a spinel structure (space group: Fd 3̄ m ). 67,68 These reveal that the outer surface and subsurface regions of LRNCM suffer from severe structural degradation and phase transformation during deep charge and discharge cycles. Consequently, it can be concluded that a stable surface protective layer is of great significance to avoid direct contact between the electrode and the electrolyte.…”

Heterotrimetallic Precursor with 2:2:1 Metal Ratio Requiring at Least a Pentanuclear Molecular Assembly

“…DART Mass Spectrometry Investigation of Heterotrimetallic Complex 3. Direct Analysis in Real Time (DART) mass spectrometry has been successfully utilized to confirm the composition of complex heterometallic ions through their isotope distribution patterns 27,42,48 as well as to analyze the oxidation states of constituent transition metals. 49 In the positive-mode mass spectrum of solid [Mn(ptac) 3 NaFe-(acac) 3 NaMn(ptac) 3 ] (3), the peak corresponding to the [M-L] + (L = ptac; meas/calcd m/z = 1484.2365/1484.2410) ion appears with a characteristic isotope distribution pattern in good agreement with the simulated one (Figure 5a and SI, Figure S15 and Tables S17 and S18) confirming the presence S13−S16).…”