SbPS4:A novel anode for high-performance sodium-ion batteries

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With the in-depth research of sodium-ion batteries (SIBs),the development of novel sodium-ion an-ode material has become a top priority.In this work,tube cluster-shaped SbPS4 was synthesized by a high-temperature solid phase reaction.Then the typical short tubular ternary thiophosphate SbPS4 compounded with graphene oxide (SbPS4/GO) was successfully synthesized after ultrasonication and freeze-drying.SbPS4 shows a high theoretical specific capacity (1335 mAh/g) according to the conversion-alloying dual mechanisms.The unique short tube inserted in the spongy graphene structure of SbPS4/GO results in boosting the Na ions transport and alleviating the huge volume change in the charging and discharging processes,improving the sodium storage performance.Consequently,the tubular SbPS4 com-pounded with 10% GO provides an outstanding capacity of 359.58 mAh/g at 500 mA/g.The result indi-cates that SbPS4/GO anode has a promising application potential for SIBs.
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