List of Figures
xxvii
Fig. 6.7
XRD scans in the two-phase region below the NM line obtained
for quenched samples. Compositions of samples J 6 and K 6 are
indicated on Fig. 6.5 ....................................................
82
Fig. 6.8
XRD patterns of the four samples found at the corners of the
three-phase regions for samples heated in oxygen and quenched.
The peak indices are indicated based on JCPDS #89-4619 for the
ordered rocksalt phase and #52-0457 for the layered phases. The
spinel peaks have the same indices as the ordered rocksalt;
though there are no (200), (331), and (422) reflections in the
spinel structures and the (220) peak is weak. The M-layered
structure is indexed to a hexagonal structure as discussed in the
text. The N-layered peaks have the same indices, though the
(018) and (110) peaks are not separated..............................
85
Fig. 6.9
XRD patterns generated at the four corners of the three-phase
regions obtained by quenching (left) and regular cooling (right).
The coordinates are (Li, Mn) where Li is the lithium metal
fraction and Mn is the manganese metal fraction ...................
85
Fig. 6.10 XRD scans of samples in the three-phase regions obtained by
quenching. The fits are included as well as difference plots below
each scan. The labels (b, c, d . . . ) match those used in Fig. 6.5 ..
86
Fig. 6.11 Partial XRD scans of samples in the three-phase regions obtained
by quenching. Left: samples in the NSM triangle. Right: samples
in the NSR triangle. The labels (a, b, c . . . ) match those used in
Fig. 6.5 ...................................................................
87
Fig. 6.12 A partial phase diagram focusing on the three-phase regions for
quenched samples. Samples represented by the red points show
three-phases and they are connected to points on the tie-lines as
calculated with the lever rule ..........................................
88
Fig. 6.13 XRD scans obtained in oxygen by quenching (red-solid), regular
cooling (blue-dashed), and slow cooling (black dotted). The
vertical red dashed lines indicate the positions of the peaks
obtained by quenching .................................................
89
Fig. 6.14 A partial phase diagram with useful composition labels used
throughout this chapter .................................................
89
Fig. 6.15 XRD scans of samples in three-phase regions obtained by regular
cooling with fits and difference plots below each scan. The labels
(d, e, f . . . ) match those used in Fig. 6.17...........................
90
Fig. 6.16 Partial XRD patterns obtained in the three-phase regions by
regular cooling. The labels (a, b, c . . . ) match those used in
Fig. 6.17..................................................................
90
Fig. 6.17 A partial phase diagram showing compositions used in Figs. 6.15
and 6.16 ..................................................................
91
Fig. 6.18 Left: SEM images taken by Ramesh Shunmugasundaram of three
combinatorial samples made in oxygen with regular cooling. a
and b are two images of a sample with (Li, Mn) = (0.5, 0.25). c
xxvii
Fig. 6.7
XRD scans in the two-phase region below the NM line obtained
for quenched samples. Compositions of samples J 6 and K 6 are
indicated on Fig. 6.5 ....................................................
82
Fig. 6.8
XRD patterns of the four samples found at the corners of the
three-phase regions for samples heated in oxygen and quenched.
The peak indices are indicated based on JCPDS #89-4619 for the
ordered rocksalt phase and #52-0457 for the layered phases. The
spinel peaks have the same indices as the ordered rocksalt;
though there are no (200), (331), and (422) reflections in the
spinel structures and the (220) peak is weak. The M-layered
structure is indexed to a hexagonal structure as discussed in the
text. The N-layered peaks have the same indices, though the
(018) and (110) peaks are not separated..............................
85
Fig. 6.9
XRD patterns generated at the four corners of the three-phase
regions obtained by quenching (left) and regular cooling (right).
The coordinates are (Li, Mn) where Li is the lithium metal
fraction and Mn is the manganese metal fraction ...................
85
Fig. 6.10 XRD scans of samples in the three-phase regions obtained by
quenching. The fits are included as well as difference plots below
each scan. The labels (b, c, d . . . ) match those used in Fig. 6.5 ..
86
Fig. 6.11 Partial XRD scans of samples in the three-phase regions obtained
by quenching. Left: samples in the NSM triangle. Right: samples
in the NSR triangle. The labels (a, b, c . . . ) match those used in
Fig. 6.5 ...................................................................
87
Fig. 6.12 A partial phase diagram focusing on the three-phase regions for
quenched samples. Samples represented by the red points show
three-phases and they are connected to points on the tie-lines as
calculated with the lever rule ..........................................
88
Fig. 6.13 XRD scans obtained in oxygen by quenching (red-solid), regular
cooling (blue-dashed), and slow cooling (black dotted). The
vertical red dashed lines indicate the positions of the peaks
obtained by quenching .................................................
89
Fig. 6.14 A partial phase diagram with useful composition labels used
throughout this chapter .................................................
89
Fig. 6.15 XRD scans of samples in three-phase regions obtained by regular
cooling with fits and difference plots below each scan. The labels
(d, e, f . . . ) match those used in Fig. 6.17...........................
90
Fig. 6.16 Partial XRD patterns obtained in the three-phase regions by
regular cooling. The labels (a, b, c . . . ) match those used in
Fig. 6.17..................................................................
90
Fig. 6.17 A partial phase diagram showing compositions used in Figs. 6.15
and 6.16 ..................................................................
91
Fig. 6.18 Left: SEM images taken by Ramesh Shunmugasundaram of three
combinatorial samples made in oxygen with regular cooling. a
and b are two images of a sample with (Li, Mn) = (0.5, 0.25). c