库 is a simplified Chinese hanzi, listed here under the keyword “armory”. It is built from 广 (wide) and 车 (cart). It appears as a component in 1 other character in this index.
On KumiJi Glyph Explorer, open the parts search and type “wide” + “cart”. 库 is among the results, together with every other character containing the same shapes.
Open 库 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.