A nanoscale pseudo-graphite hard carbon offers marvelous electrochemistry properties for the sodium ion battery as anode, exhibiting a superb initial Coulombic efficiency of 86% with the sodium alginate binder, which is presumably ascribed to thin and smooth solid electrolyte interface layer. The aforesaid binder system delivers an optimal reversible capacity of 344.4 mA h g(-1), maintaining 324.8 mA h g(-1) (94.3% at 100th cycle) and 284.8 mA h g(-1) (82.6% at 200th cycle) at 0.1C. However, this capacity collapses from 230th cycle with a representative "bluff" curve, which frequently occurs in hydrophilic binders noteworthily. Consequently, the characteristics of the sodium alginate binder are intensively explored: (a) carboxy groups build up the typical multi-dimensional infiltration network by constructing renewable hydrogen bonds (H-bonds) skeleton. (2) This network mitigates the intergranular spacing, infiltrates the micropores and decorates the solid-electrolyte-interface layer, (c) which restrains the network from decomposition caused by the electrolyte. (d) Repeated current impacting and the oxidative decomposition from the NaClO4 electrolyte eventually break the network structure, leading to in-adhesion and "bluff" capacity fading.