With　the　development　of　flexible　electronics,　the　demand　for　flexibility　is　gradually　put　forward　for　its　energy　supply　device,　i.e.,　battery,　to　fit　complex　curved　surfaces　with　good　fatigue　resistance　and　safety.　As　an　important　component　of　flexible　batteries,　flexible　electrodes　play　a　key　role　in　the　energy　density,　power　density,　and　mechanical　flexibility　of　batteries.　Their　large-scale　commercial　applications　depend　on　the　fulfillment　of　the　commercial　requirements　and　the　fabrication　methods　of　electrode　materials.　In　this　paper,　the　deformable　electrode　materials　and　structural　design　for　flexible　batteries　are　summarized,　with　the　purpose　of　flexibility.　The　advantages　and　disadvantages　of　the　application　of　various　flexible　materials　(carbon　nanotubes,　graphene,　MXene,　carbon　fiber/carbon　fiber　cloth,　and　conducting　polymers)　and　flexible　structures　(buckling　structure,　helical　structure,　and　kirigami　structure)　in　flexible　battery　electrodes　are　discussed.　In　addition,　the　application　scenarios　of　flexible　batteries　and　the　main　challenges　and　future　development　of　flexible　electrode　fabrication　are　also　discussed,　providing　general　guidance　for　the　research　of　high-performance　flexible　electrodes.　©　2022　The　Authors.　Advanced　Science　published　by　Wiley-VCH　GmbH.