The article reviews recent progress and challenges in the development of flexible electrochemical energy storage devices, particularly focusing on supercapacitors, lithium-ion batteries, and zinc-ion batteries. It highlights the urgent need for cost-effective and environmentally friendly energy storage solutions for wearable electronics. The review covers the design and synthesis strategies for flexible electrode materials and gel electrolytes, emphasizing their mechanical and electrochemical properties. Key advancements in flexible supercapacitors, zinc-ion batteries, and other energy storage systems are discussed, along with the challenges and future directions for next-generation flexible energy storage devices. The article also explores the use of carbon-based materials and conductive polymers in these devices, detailing their structural characteristics, fabrication processes, and applications. Finally, it addresses the importance of optimizing flexible electrode and electrolyte materials to enhance the performance and durability of flexible energy storage systems.The article reviews recent progress and challenges in the development of flexible electrochemical energy storage devices, particularly focusing on supercapacitors, lithium-ion batteries, and zinc-ion batteries. It highlights the urgent need for cost-effective and environmentally friendly energy storage solutions for wearable electronics. The review covers the design and synthesis strategies for flexible electrode materials and gel electrolytes, emphasizing their mechanical and electrochemical properties. Key advancements in flexible supercapacitors, zinc-ion batteries, and other energy storage systems are discussed, along with the challenges and future directions for next-generation flexible energy storage devices. The article also explores the use of carbon-based materials and conductive polymers in these devices, detailing their structural characteristics, fabrication processes, and applications. Finally, it addresses the importance of optimizing flexible electrode and electrolyte materials to enhance the performance and durability of flexible energy storage systems.