## 1 Introduction  
Understanding commercial lithium battery functionality and performance is key towards advancing energy storage options for the future. When observing small (nanometer to micrometer sized) particles, determining the role of lithium in a battery's cell can lead to optimized battery construction. Challenges of battery manufacturing and characterization include short-circuiting from lithium dendrites, crack formation, particle fracture, and a loss of contact from volume expansion during lithium intercalation/de-intercalation [1, 2, 3]. While many X-ray diffraction, bulk neutron diffraction, and nuclear magnetic resonance (NMR) studies have provided many valuable insights [4], there is still need for additional methods that can provide insight into in-situ, cell-level degradation of a commercial battery. Recent work has explored this need by describing the challenges and benefits of many neutron and X-ray techniques for the use of battery characterization [5]. In order to non-destructively observe battery degradation, there is a pressing need for exploration of new non-destructive testing (NDT) techniques geared towards battery characterization and visualization. In search of these NDT methods, recent publications have provided valuable insight into the offerings of both X-ray and neutron techniques [5, 6]. Specifically, neutron diffraction has proven valuable and often used [7, 8]. [PERSON] et al. performed neutron powder diffraction experiments on single layer, prismatic, cylindrical, and confined batteries highlighting neutron diffraction for phase and crystal structure evolution [9]. Other in-situ and in-operando neutron diffraction experiments of non-commercial batteries show formation of several intermediate components during the charging and discharging processes [10, 11, 12, 13, 14, 15, 16, 17]. [PERSON] et al. used time-of-flight neutron diffraction to study a commercial 18,650-type battery with nominal capacity of 3100 mAh over 0.10 nm to 0.35 nm d-spacing, probing an extremely wide and useful diffraction range [18]. Other battery diffraction experiments observed a substitution of Mn for Mg in LiMgSiO\({}_{4}\) cathode components and spatial observation of Fe/NaCl and cylindrical Li-ion 18,650 cells [19, 20, 21]. While neutron diffraction is a useful tool for battery characterization, it is not usually performed to reveal spatial information of where battery failure can occur. Line profiles across a large, 15 Ah, battery were performed by [PERSON] et al. revealing inhomogenous degradation near the battery edges. Bragg edge imaging is another method to visualize and characterize the crystallographic changes within a battery [22, 23, 24]. Using a monochromator, a series of images are collected at differing wavelengths (either X-rays or neutrons) to observe phase changes in the material. If there is a phase change, the transmission signal increases greatly once a crystallographic plane is no longer probed. This is based upon [PERSON]'s law, \(\lambda=2d_{hkl}sin\theta\), where neutrons with DeBroglie wavelength, \(\lambda\), are scattered coherently at angles of \(2\theta\) (where \(\theta\) is the Bragg angle) relative to the incident neutron direction from lattice planes at certain plane spacings, \(d_{hkl}\). In the case of neutron Bragg edge imaging of lithium batteries, transmission images and spectra showed the appearance and disappearance of peaks as a battery is converted from discharged to fully charged [22]. In comparison to diffraction and Bragg edge imaging, X-ray and neutron imaging have gained recent traction despite the challenges of in-situ imaging an intact, commercially-produced Li-ion battery. The main challenges of X-ray imaging batteries include the extraction of relevant information from large datasets and designing cells to fit in X-ray system setups, however X-ray systems tend to have higher resolution than neutron imaging setups [5].