Active cooling like a pelteir cooler or Fridge compressor is going to use quite a bit of power. Water in the tropics is upwards of 85F, so that isn't much help either.
If this is a large battery for an electric propulsion systems, that opens up options as you have the power available to run some real cooling. But if it is just a moderate sized house bank charged by solar....
I have just accepted that I will had shortened life, but still expect my LFP to last many, many years. After more than 1 year I am less than 100 cycles, and I still test capacity at 110% of rating. So if I get 1000 cycles or 1500 cycles instead of 2000 cycles, that's still 10 or 15 years.