How many volts has an energy-to-weight ratio of 54 kj/kg to 2.0v?
CREATE TABLE "electrostatic_electrolytic_and_electroch" (
  "capacity" text,
  "volts" text,
  "temp" text,
  "energy_to_weight_ratio" text,
  "power_to_weight_ratio" text
);
SELECT "volts" FROM "electrostatic_electrolytic_and_electroch" WHERE "energy_to_weight_ratio"='54 kj/kg to 2.0v';