Electrochromic (EC) materials, among the key "green" technological components for sustainability and energy savings, have piqued the interest of academia and industry alike. Tungsten oxide (WO3) is an extensively researched EC material that is widely used in today's smart windows. One popular EC approach is the reversible insertion of small ions into electrode materials. Thin films of WO3 can therefore change their color from clear to deep blue by adjusting lithium ion (Li+) insertion under a low voltage bias. As low voltage operations are beneficial for a multitude of applications, Li+ intercalated WO3 (LixWO3) is a viable option for EC device applications.