Hollow mesoporous MnO/MnS/SiC/S-CN composites prepared from soda pulping black liquor for lithium-ion batteries

MnX/SiC/S-carbon nanosheets (MnX/SiC/S-CN) were synthesized by using soda pulping black liquor (SPBL) as raw material and template. The phase components of MnX/SiC/S-CN were controlled and designed by changing doping amount of MnSO4. Herein, the hollow mesoporous MnO/MnS/SiC/S-carbon nanosheet (MnO/MnS/SiC/S-CN) composites were prepared and exhibited excellent electrochemical performances. As anode, the MnO/MnS/SiC/S-CN electrode delivered good cycle performance (756 mAh g(-1) after 50 cycles at a current density of 1000 mA g(-1)) and remarkable rate capability (685 mAh g(-1) when the current density backed to the initial current of 1 A g(-1) after a high current density ranging from 1 A g(-1) to 20 A g(-1) for 70 cycles). The presence of flexile SiC/S-graphitized carbon nanosheets (SiC/SGCN) is able to buffer the large volume expansion and contraction of MnO/MnS nanoparticles during the cycling process. Otherwise, the hollow porous is another key factor that not only decreases the transmission distance of Li+ and electron, but also provides internal and external surface for the attachment of Li+. Recycled resources of SPBL help protect our environment, keep our planet healthy and provide highly economic values. (C) 2017 Elsevier B.V. All rights reserved.