Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Size-dependent phase morphologies in LiFePO4 battery particles   Lithium iron phosphate (LiFePO$_4$) is the prototypical two-phase battery
material, whose complex patterns of lithium ion intercalation provide a testing
ground for theories of electrochemical thermodynamics. Using a depth-averaged
(a-b plane) phase-field model of coherent phase separation driven by Faradaic
reactions, we reconcile conflicting experimental observations of diamond-like
phase patterns in micron-sized platelets and surface-controlled patterns in
nanoparticles. Elastic analysis predicts this morphological transition for
particles whose a-axis dimension exceeds the bulk elastic stripe period. We
also simulate a rich variety of non-equilibrium patterns, influenced by
size-dependent spinodal points and electro-autocatalytic control of
thermodynamic stability.

20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin