The article provides a comprehensive overview of the current advancements in transition metal compound electrode materials for supercapacitors (SCs). Supercapacitors, known for their high power densities and long cycle life, have gained significant attention due to their superior performance compared to traditional capacitors. However, their low energy density limits their widespread commercial use. Transition metal compounds, with their high specific capacity and good cycling durability, are promising candidates for high-energy density SCs. However, challenges such as low conductivity, poor ion diffusion rates, and significant volume expansion during charging and discharging need to be addressed. The study highlights the synthetic techniques and management strategies for improving the performance of transition metal nanomaterials as SC electrodes. It also discusses the existing problems and future directions in SC development, emphasizing the potential of transition metal compound electrode materials. The article reviews the classification of SCs into electrochemical double layer capacitors (EDLCs) and pseudocapacitors (PCs), and the mechanisms of energy storage in these materials. It further explores the blurring boundaries between battery and pseudocapacitive materials due to nanoscale effects and introduces methods to distinguish between them, such as CV and GCD analysis. Finally, it discusses the configuration of symmetric, asymmetric, and hybrid devices based on different electrode materials.The article provides a comprehensive overview of the current advancements in transition metal compound electrode materials for supercapacitors (SCs). Supercapacitors, known for their high power densities and long cycle life, have gained significant attention due to their superior performance compared to traditional capacitors. However, their low energy density limits their widespread commercial use. Transition metal compounds, with their high specific capacity and good cycling durability, are promising candidates for high-energy density SCs. However, challenges such as low conductivity, poor ion diffusion rates, and significant volume expansion during charging and discharging need to be addressed. The study highlights the synthetic techniques and management strategies for improving the performance of transition metal nanomaterials as SC electrodes. It also discusses the existing problems and future directions in SC development, emphasizing the potential of transition metal compound electrode materials. The article reviews the classification of SCs into electrochemical double layer capacitors (EDLCs) and pseudocapacitors (PCs), and the mechanisms of energy storage in these materials. It further explores the blurring boundaries between battery and pseudocapacitive materials due to nanoscale effects and introduces methods to distinguish between them, such as CV and GCD analysis. Finally, it discusses the configuration of symmetric, asymmetric, and hybrid devices based on different electrode materials.