Electrochemical grinding-induced metallic assembly exploiting a facile conversion reaction route of metal oxides toward Li ions

Direct Cation–Cation Interactions Induced by Mg Dopants for Electron–Gas Behavior in α-Fe2O3

“…According to Rietveld refinement, the molar concentration of the MgFe 2 O 4 impurity in Mg15 is only 6% (Figure S4), less than that observed in TEM images, due to two possible reasons: (1) because of their smaller size, more MgFe 2 O 4 particles can be suspended in the solvent during the preparation of TEM specimens and (2) the crystallite sizes of some MgFe 2 O 4 particles are too small to generate Bragg reflections in XRD patterns …”

“…According to Rietveld refinement, the molar concentration of the MgFe 2 O 4 impurity in Mg15 is only 6% (Figure S4), less than that observed in TEM images, due to two possible reasons: (1) because of their smaller size, more MgFe 2 O 4 particles can be suspended in the solvent during the preparation of TEM specimens and (2) the crystallite sizes of some MgFe 2 O 4 particles are too small to generate Bragg reflections in XRD patterns. 24 The typical local structure in α-Fe 2 O 3 is the FeO 6 octahedron, which shares one face and three edges with neighboring octahedra (Figure 2a). In this view, the crystal structure of α-Fe 2 O 3 can be described briefly by the chains of the paired FeO 6 octahedra via face sharing and an ordered octahedral vacancy (6b site) alternatively along the long axis, illustrated as −Fe−Fe−□−Fe−Fe−□−Fe−Fe− where □ represents the empty octahedral interstitial 6b site (see (I) in Figure 2a).…”

Interplanar Spacing Engineering on Copper‐Benzenedicarboxylate Toward Stabilized Lithium Storage

“…This kind of process is also called electrochemical grinding, which may be accompanied by the rearrangement of crystal structure and large internal stress in the crystal. [9] Cu-mBDC and Cu-pBDC also underwent electrochemical grinding during charge and discharge cycles, and their performances are shown in Figure 5b,c. The first specific charge/ discharge capacity of Cu-mBDC was 687.6/1523.6 mAh g À1 , and the coulombic efficiency was 45.13%.…”

Bioinspired redox-coupled conversion reaction in FeOOH-acetate hybrid nanoplatelets for Na ion battery

“…The absence of detectable reflections upon further discharge below 1 V indicates the destruction of the structure, resulting in the formation of ultrafine grains of products from conversion reactions. 32 Ex situ TEM was conducted to inspect these finely sized products (Fig. 3b–d).…”